DNSSEC Analyzer - columbia.edu

Domain Name:

Time: 2022-01-28 18:43:03 UTC, NTP stratum 16

Analyzing DNSSEC problems for columbia.edu

DS=20326/SHA-256 is now in the chain-of-trust

	Checking DS between Trust Anchor and .
	`. IN DS ( 20326 8 2 e06d44b80b8f1d39a95c0b0d7c65d08458e880409bbc683457104237c7f8ec8d )`
	Query to b.root-servers.net for ./DNSKEY
	Received 865 bytes from 199.9.14.201
	;; Response received from 199.9.14.201 (865 octets) ;; HEADER SECTION ;; id = 26637 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 3 nscount = 0 arcount = 1 ;; do = 1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option: ;; QUESTION SECTION (1 record) ;; . IN DNSKEY ;; ANSWER SECTION (3 records) . 172800 IN DNSKEY ( 257 3 8 AwEAAaz/tAm8yTn4Mfeh5eyI96WSVexTBAvkMgJzkKTOiW1vkIbzxeF3+/4RgWOq7HrxRixHlFlE xOLAJr5emLvN7SWXgnLh4+B5xQlNVz8Og8kvArMtNROxVQuCaSnIDdD5LKyWbRd2n9WGe2R8PzgC mr3EgVLrjyBxWezF0jLHwVN8efS3rCj/EWgvIWgb9tarpVUDK/b58Da+sqqls3eNbuv7pr+eoZG+ SrDK6nWeL3c6H5Apxz7LjVc1uTIdsIXxuOLYA4/ilBmSVIzuDWfdRUfhHdY6+cn8HFRm+2hM8AnX GXws9555KrUB5qihylGa8subX2Nn6UwNR1AkUTV74bU= ) ; Key ID = 20326 . 172800 IN DNSKEY ( 256 3 8 AwEAAZym4HCWiTAAl2Mv1izgTyn9sKwgi5eBxpG29bVlefq/r+TGCtmUElvFyBWHRjvf9mBglIlT BRse22dvzNOI+cYrkjD6LOHuxMoc/d4WtXWKdviNmrtWF2GpjmDOI98gLd4BZ0U/lY847mJP9Lyp FABZcEn3zM3vce4Ee1A3upSlFQ2TFyJSD9HvMnP4XneFexBxV96RpLcy2O+u2W6ChIiDCjlrowPC cU3zXfXxyWy/VKM6TOa8gNf+aKaVkcv/eIh5er8rrsqAi9KT8O5hmhzYLkUOQEXVSRORV0RMt9l3 JSwWxT1MebEDvtfBag3uo+mZwWSFlpc9kuzyWBd72Ec= ) ; Key ID = 9799 . 172800 IN RRSIG ( DNSKEY 8 0 172800 20220211000000 20220121000000 20326 . om3IP7/pygJB+wAMHkUGb9wieFct9IztEoinwqlY+w3h34cFTih1NRAjBpdu7y3xMpp4LMRfyUYE 3MGDFi58upW6qY0sM8TBFXzPhBZitqLJM2sB07UHe0rstrbSvdq+9IAbXFkK6mRhtREggvleuRYH X/SnVW9QPHv8jxrZJDkNRYmW9NiwJoRwvI53v2BklBBe9P8Q61edXydlX9KsHJYqw4DF8FdpfE3o ajN0vnIwMWFpTJYXbOnPjAwf/SntpUxYawFYDssksaLl56kP/440O2F/tdIjdtwnBS2lMGrLASSe IT4VJmQI8Gm2RCHzN49Nywct3SbcpUuWJoZCEQ== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option:
	Found 2 DNSKEY records for .
	`. 172800 IN DNSKEY ( 257 3 8 AwEAAaz/tAm8yTn4Mfeh5eyI96WSVexTBAvkMgJzkKTOiW1vkIbzxeF3+/4RgWOq7HrxRixHlFlE xOLAJr5emLvN7SWXgnLh4+B5xQlNVz8Og8kvArMtNROxVQuCaSnIDdD5LKyWbRd2n9WGe2R8PzgC mr3EgVLrjyBxWezF0jLHwVN8efS3rCj/EWgvIWgb9tarpVUDK/b58Da+sqqls3eNbuv7pr+eoZG+ SrDK6nWeL3c6H5Apxz7LjVc1uTIdsIXxuOLYA4/ilBmSVIzuDWfdRUfhHdY6+cn8HFRm+2hM8AnX GXws9555KrUB5qihylGa8subX2Nn6UwNR1AkUTV74bU= ) ; Key ID = 20326`
	`. 172800 IN DNSKEY ( 256 3 8 AwEAAZym4HCWiTAAl2Mv1izgTyn9sKwgi5eBxpG29bVlefq/r+TGCtmUElvFyBWHRjvf9mBglIlT BRse22dvzNOI+cYrkjD6LOHuxMoc/d4WtXWKdviNmrtWF2GpjmDOI98gLd4BZ0U/lY847mJP9Lyp FABZcEn3zM3vce4Ee1A3upSlFQ2TFyJSD9HvMnP4XneFexBxV96RpLcy2O+u2W6ChIiDCjlrowPC cU3zXfXxyWy/VKM6TOa8gNf+aKaVkcv/eIh5er8rrsqAi9KT8O5hmhzYLkUOQEXVSRORV0RMt9l3 JSwWxT1MebEDvtfBag3uo+mZwWSFlpc9kuzyWBd72Ec= ) ; Key ID = 9799`
	DNSKEY=20326/SEP is now in the chain-of-trust
	DS=20326/SHA-256 verifies DNSKEY=20326/SEP
	Found 1 RRSIGs over DNSKEY RRset
	`. 172800 IN RRSIG ( DNSKEY 8 0 172800 20220211000000 20220121000000 20326 . om3IP7/pygJB+wAMHkUGb9wieFct9IztEoinwqlY+w3h34cFTih1NRAjBpdu7y3xMpp4LMRfyUYE 3MGDFi58upW6qY0sM8TBFXzPhBZitqLJM2sB07UHe0rstrbSvdq+9IAbXFkK6mRhtREggvleuRYH X/SnVW9QPHv8jxrZJDkNRYmW9NiwJoRwvI53v2BklBBe9P8Q61edXydlX9KsHJYqw4DF8FdpfE3o ajN0vnIwMWFpTJYXbOnPjAwf/SntpUxYawFYDssksaLl56kP/440O2F/tdIjdtwnBS2lMGrLASSe IT4VJmQI8Gm2RCHzN49Nywct3SbcpUuWJoZCEQ== )`
	RRSIG=20326 and DNSKEY=20326/SEP verifies the DNSKEY RRset
	DNSKEY=9799 is now in the chain-of-trust
	Query to e.root-servers.net for columbia.edu/A
	Received 1171 bytes from 192.203.230.10
	;; Response received from 192.203.230.10 (1171 octets) ;; HEADER SECTION ;; id = 14736 ;; qr = 1 aa = 0 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 0 nscount = 15 arcount = 27 ;; do = 1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 4096 ;; option: ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (15 records) edu. 172800 IN NS a.edu-servers.net. edu. 172800 IN NS b.edu-servers.net. edu. 172800 IN NS c.edu-servers.net. edu. 172800 IN NS d.edu-servers.net. edu. 172800 IN NS e.edu-servers.net. edu. 172800 IN NS f.edu-servers.net. edu. 172800 IN NS g.edu-servers.net. edu. 172800 IN NS h.edu-servers.net. edu. 172800 IN NS i.edu-servers.net. edu. 172800 IN NS j.edu-servers.net. edu. 172800 IN NS k.edu-servers.net. edu. 172800 IN NS l.edu-servers.net. edu. 172800 IN NS m.edu-servers.net. edu. 86400 IN DS ( 28065 8 2 4172496cde85534e51129040355bd04b1fcfebae996dfdde652006f6f8b2ce76 ) edu. 86400 IN RRSIG ( DS 8 1 86400 20220210170000 20220128160000 9799 . FmMWcHQJHkO7j8J8vwJK7p6aC5nonHPIR6Zk5I8SQNs5Ppe8IML4YyjTsR/M8qfpi+TCeJn3Gbh7 aFdNXOJbPUjMTw/Kp7hCyjiG7i+OCoqrLbs9eL2yqa0txNEdqltUESP4kWGapQEabx+bkYRirAm7 xI1ltIgNGMbE9YBwRDoNCRh/5W2o1L499SVK7z+J+LOlCzX79vNr2KdWt8p5tTn8v39Vo8Tq5pD6 t3UQyKwVp0zxAd/Wct3+cD2jVuOmBkhjIRme3HsfRRWfuAOcgV7DJsgg3ft938y0QIX2ooPTY2pk +ew9DPmz6FbBDGL0uvb4x8sIx0kg0q27YOCAPg== ) ;; ADDITIONAL SECTION (27 records) a.edu-servers.net. 172800 IN A 192.5.6.30 b.edu-servers.net. 172800 IN A 192.33.14.30 c.edu-servers.net. 172800 IN A 192.26.92.30 d.edu-servers.net. 172800 IN A 192.31.80.30 e.edu-servers.net. 172800 IN A 192.12.94.30 f.edu-servers.net. 172800 IN A 192.35.51.30 g.edu-servers.net. 172800 IN A 192.42.93.30 h.edu-servers.net. 172800 IN A 192.54.112.30 i.edu-servers.net. 172800 IN A 192.43.172.30 j.edu-servers.net. 172800 IN A 192.48.79.30 k.edu-servers.net. 172800 IN A 192.52.178.30 l.edu-servers.net. 172800 IN A 192.41.162.30 m.edu-servers.net. 172800 IN A 192.55.83.30 a.edu-servers.net. 172800 IN AAAA 2001:503:a83e::2:30 b.edu-servers.net. 172800 IN AAAA 2001:503:231d::2:30 c.edu-servers.net. 172800 IN AAAA 2001:503:83eb::30 d.edu-servers.net. 172800 IN AAAA 2001:500:856e::30 e.edu-servers.net. 172800 IN AAAA 2001:502:1ca1::30 f.edu-servers.net. 172800 IN AAAA 2001:503:d414::30 g.edu-servers.net. 172800 IN AAAA 2001:503:eea3::30 h.edu-servers.net. 172800 IN AAAA 2001:502:8cc::30 i.edu-servers.net. 172800 IN AAAA 2001:503:39c1::30 j.edu-servers.net. 172800 IN AAAA 2001:502:7094::30 k.edu-servers.net. 172800 IN AAAA 2001:503:d2d::30 l.edu-servers.net. 172800 IN AAAA 2001:500:d937::30 m.edu-servers.net. 172800 IN AAAA 2001:501:b1f9::30 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 4096 ;; option:
	Query to m.root-servers.net for edu/DNSKEY
	Received 1162 bytes from 202.12.27.33
	;; Response received from 202.12.27.33 (1162 octets) ;; HEADER SECTION ;; id = 44962 ;; qr = 1 aa = 0 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 0 nscount = 15 arcount = 27 ;; do = 1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 4096 ;; option: ;; QUESTION SECTION (1 record) ;; edu. IN DNSKEY ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (15 records) edu. 172800 IN NS l.edu-servers.net. edu. 172800 IN NS f.edu-servers.net. edu. 172800 IN NS e.edu-servers.net. edu. 172800 IN NS m.edu-servers.net. edu. 172800 IN NS a.edu-servers.net. edu. 172800 IN NS c.edu-servers.net. edu. 172800 IN NS d.edu-servers.net. edu. 172800 IN NS j.edu-servers.net. edu. 172800 IN NS h.edu-servers.net. edu. 172800 IN NS b.edu-servers.net. edu. 172800 IN NS k.edu-servers.net. edu. 172800 IN NS i.edu-servers.net. edu. 172800 IN NS g.edu-servers.net. edu. 86400 IN DS ( 28065 8 2 4172496cde85534e51129040355bd04b1fcfebae996dfdde652006f6f8b2ce76 ) edu. 86400 IN RRSIG ( DS 8 1 86400 20220210170000 20220128160000 9799 . FmMWcHQJHkO7j8J8vwJK7p6aC5nonHPIR6Zk5I8SQNs5Ppe8IML4YyjTsR/M8qfpi+TCeJn3Gbh7 aFdNXOJbPUjMTw/Kp7hCyjiG7i+OCoqrLbs9eL2yqa0txNEdqltUESP4kWGapQEabx+bkYRirAm7 xI1ltIgNGMbE9YBwRDoNCRh/5W2o1L499SVK7z+J+LOlCzX79vNr2KdWt8p5tTn8v39Vo8Tq5pD6 t3UQyKwVp0zxAd/Wct3+cD2jVuOmBkhjIRme3HsfRRWfuAOcgV7DJsgg3ft938y0QIX2ooPTY2pk +ew9DPmz6FbBDGL0uvb4x8sIx0kg0q27YOCAPg== ) ;; ADDITIONAL SECTION (27 records) a.edu-servers.net. 172800 IN A 192.5.6.30 b.edu-servers.net. 172800 IN A 192.33.14.30 c.edu-servers.net. 172800 IN A 192.26.92.30 d.edu-servers.net. 172800 IN A 192.31.80.30 e.edu-servers.net. 172800 IN A 192.12.94.30 f.edu-servers.net. 172800 IN A 192.35.51.30 g.edu-servers.net. 172800 IN A 192.42.93.30 h.edu-servers.net. 172800 IN A 192.54.112.30 i.edu-servers.net. 172800 IN A 192.43.172.30 j.edu-servers.net. 172800 IN A 192.48.79.30 k.edu-servers.net. 172800 IN A 192.52.178.30 l.edu-servers.net. 172800 IN A 192.41.162.30 m.edu-servers.net. 172800 IN A 192.55.83.30 a.edu-servers.net. 172800 IN AAAA 2001:503:a83e::2:30 b.edu-servers.net. 172800 IN AAAA 2001:503:231d::2:30 c.edu-servers.net. 172800 IN AAAA 2001:503:83eb::30 d.edu-servers.net. 172800 IN AAAA 2001:500:856e::30 e.edu-servers.net. 172800 IN AAAA 2001:502:1ca1::30 f.edu-servers.net. 172800 IN AAAA 2001:503:d414::30 g.edu-servers.net. 172800 IN AAAA 2001:503:eea3::30 h.edu-servers.net. 172800 IN AAAA 2001:502:8cc::30 i.edu-servers.net. 172800 IN AAAA 2001:503:39c1::30 j.edu-servers.net. 172800 IN AAAA 2001:502:7094::30 k.edu-servers.net. 172800 IN AAAA 2001:503:d2d::30 l.edu-servers.net. 172800 IN AAAA 2001:500:d937::30 m.edu-servers.net. 172800 IN AAAA 2001:501:b1f9::30 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 4096 ;; option:
	Found child zone edu

edu

	Checking DS between . and edu
	Query to d.root-servers.net for edu/DS
	Received 367 bytes from 199.7.91.13
	;; Response received from 199.7.91.13 (367 octets) ;; HEADER SECTION ;; id = 33485 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 2 nscount = 0 arcount = 1 ;; do = 1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1450 ;; option: ;; QUESTION SECTION (1 record) ;; edu. IN DS ;; ANSWER SECTION (2 records) edu. 86400 IN DS ( 28065 8 2 4172496cde85534e51129040355bd04b1fcfebae996dfdde652006f6f8b2ce76 ) edu. 86400 IN RRSIG ( DS 8 1 86400 20220210170000 20220128160000 9799 . FmMWcHQJHkO7j8J8vwJK7p6aC5nonHPIR6Zk5I8SQNs5Ppe8IML4YyjTsR/M8qfpi+TCeJn3Gbh7 aFdNXOJbPUjMTw/Kp7hCyjiG7i+OCoqrLbs9eL2yqa0txNEdqltUESP4kWGapQEabx+bkYRirAm7 xI1ltIgNGMbE9YBwRDoNCRh/5W2o1L499SVK7z+J+LOlCzX79vNr2KdWt8p5tTn8v39Vo8Tq5pD6 t3UQyKwVp0zxAd/Wct3+cD2jVuOmBkhjIRme3HsfRRWfuAOcgV7DJsgg3ft938y0QIX2ooPTY2pk +ew9DPmz6FbBDGL0uvb4x8sIx0kg0q27YOCAPg== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1450 ;; option:
	Found 1 DS records for edu in the . zone
	DS=28065/SHA-256 has algorithm RSASHA256
	Found 1 RRSIGs over DS RRset
	`edu. 86400 IN RRSIG ( DS 8 1 86400 20220210170000 20220128160000 9799 . FmMWcHQJHkO7j8J8vwJK7p6aC5nonHPIR6Zk5I8SQNs5Ppe8IML4YyjTsR/M8qfpi+TCeJn3Gbh7 aFdNXOJbPUjMTw/Kp7hCyjiG7i+OCoqrLbs9eL2yqa0txNEdqltUESP4kWGapQEabx+bkYRirAm7 xI1ltIgNGMbE9YBwRDoNCRh/5W2o1L499SVK7z+J+LOlCzX79vNr2KdWt8p5tTn8v39Vo8Tq5pD6 t3UQyKwVp0zxAd/Wct3+cD2jVuOmBkhjIRme3HsfRRWfuAOcgV7DJsgg3ft938y0QIX2ooPTY2pk +ew9DPmz6FbBDGL0uvb4x8sIx0kg0q27YOCAPg== )`
	RRSIG=9799 and DNSKEY=9799 verifies the DS RRset
	DS=28065/SHA-256 is now in the chain-of-trust
	`edu. 86400 IN DS ( 28065 8 2 4172496cde85534e51129040355bd04b1fcfebae996dfdde652006f6f8b2ce76 )`
	Query to e.edu-servers.net for edu/DNSKEY
	Received 775 bytes from 192.12.94.30
	;; Response received from 192.12.94.30 (775 octets) ;; HEADER SECTION ;; id = 25610 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 3 nscount = 0 arcount = 1 ;; do = 1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 4096 ;; option: ;; QUESTION SECTION (1 record) ;; edu. IN DNSKEY ;; ANSWER SECTION (3 records) edu. 86400 IN DNSKEY ( 257 3 8 AQOluvuVWACqSUX6EZr3d5YIIv13SDXBpDeGRCIET3T0l1wp0NprtJhfc1YVehIlNqucijLnEhSL N2i0Txnh3bU5aQJLRf/qm21etL35ozAIlnfSgY5D0nxLPoBIRq++8Mxvr+2YCSRaCNyrqaU4TnHa PiHLuKe7sGyHQ8K8rXst7HxF5zgG+gIeytYIxpy4/bAaKCNVvGaYHxuNSBJBiYSrxjiZk268EP6E 3T+bSdi2HepB3ZuBWyOewsmHO8aoHmzIH049vBNI7iFZByRKY9yAJ8TshANtiUHHwAF7JJtWLW9o O10BqygYG+zS4weKGtkcNpzOUDWs41FWM8aFs4L1 ) ; Key ID = 28065 edu. 86400 IN DNSKEY ( 256 3 8 AQPbu99OwQJ6cki7qrd5QSTc84+qDtkQ4JxtA+11tleSQUZDyuTodk/OXsNurMSf1AUk8fvY4z0/ Dh8nBAl83K/9jNOPIcH5J/s4J81LmY7Tu5h4TuG/cWcSaqhzV6NQiDPDD57wKEWoENI3YjHWso1f TYFa5J4WAReLv4bySfvctWFGdyb9IYSAMQHnOaa+agHMAUKNoab4DDg5MJ4VtWmR ) ; Key ID = 47450 edu. 86400 IN RRSIG ( DNSKEY 8 1 86400 20220208195303 20220124194803 28065 edu. azX0hVU8sLLMAsBnZufnpaTIeIIPgD2Uh/bv6dJlDbi1JDx2PYExolm6p90gxP87yBu+vcL+rdwq d7w+VzB/g5Iac7ASRTMTn050Woc1YlTFFMEu6kRMEIKSw9KA9dIhozqy3RoFAkQ04U7rISQ0/Vf7 HEKpkispQWJzQLTjmNyI/fJo2XR3X9YBWqYUuKWSrWomAmQ0KuTwxcPNHZ0eeNrjRpjbdNOhGBlg wIBTtUlGKPEAOAW9Ia6dDJNTQNSo4U7eCzHCnVZJhCYGVJI3Lp+6qZwCclXJKPWiDpsnuOwUFZSo nZn1g1BVNcfKeWPdVrt3WBdqLz445NOtVivK6w== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 4096 ;; option:
	Found 2 DNSKEY records for edu
	`edu. 86400 IN DNSKEY ( 257 3 8 AQOluvuVWACqSUX6EZr3d5YIIv13SDXBpDeGRCIET3T0l1wp0NprtJhfc1YVehIlNqucijLnEhSL N2i0Txnh3bU5aQJLRf/qm21etL35ozAIlnfSgY5D0nxLPoBIRq++8Mxvr+2YCSRaCNyrqaU4TnHa PiHLuKe7sGyHQ8K8rXst7HxF5zgG+gIeytYIxpy4/bAaKCNVvGaYHxuNSBJBiYSrxjiZk268EP6E 3T+bSdi2HepB3ZuBWyOewsmHO8aoHmzIH049vBNI7iFZByRKY9yAJ8TshANtiUHHwAF7JJtWLW9o O10BqygYG+zS4weKGtkcNpzOUDWs41FWM8aFs4L1 ) ; Key ID = 28065`
	`edu. 86400 IN DNSKEY ( 256 3 8 AQPbu99OwQJ6cki7qrd5QSTc84+qDtkQ4JxtA+11tleSQUZDyuTodk/OXsNurMSf1AUk8fvY4z0/ Dh8nBAl83K/9jNOPIcH5J/s4J81LmY7Tu5h4TuG/cWcSaqhzV6NQiDPDD57wKEWoENI3YjHWso1f TYFa5J4WAReLv4bySfvctWFGdyb9IYSAMQHnOaa+agHMAUKNoab4DDg5MJ4VtWmR ) ; Key ID = 47450`
	DNSKEY=28065/SEP is now in the chain-of-trust
	DS=28065/SHA-256 verifies DNSKEY=28065/SEP
	Found 1 RRSIGs over DNSKEY RRset
	`edu. 86400 IN RRSIG ( DNSKEY 8 1 86400 20220208195303 20220124194803 28065 edu. azX0hVU8sLLMAsBnZufnpaTIeIIPgD2Uh/bv6dJlDbi1JDx2PYExolm6p90gxP87yBu+vcL+rdwq d7w+VzB/g5Iac7ASRTMTn050Woc1YlTFFMEu6kRMEIKSw9KA9dIhozqy3RoFAkQ04U7rISQ0/Vf7 HEKpkispQWJzQLTjmNyI/fJo2XR3X9YBWqYUuKWSrWomAmQ0KuTwxcPNHZ0eeNrjRpjbdNOhGBlg wIBTtUlGKPEAOAW9Ia6dDJNTQNSo4U7eCzHCnVZJhCYGVJI3Lp+6qZwCclXJKPWiDpsnuOwUFZSo nZn1g1BVNcfKeWPdVrt3WBdqLz445NOtVivK6w== )`
	RRSIG=28065 and DNSKEY=28065/SEP verifies the DNSKEY RRset
	DNSKEY=47450 is now in the chain-of-trust
	Query to k.edu-servers.net for columbia.edu/A
	Received 796 bytes from 192.52.178.30
	;; Response received from 192.52.178.30 (796 octets) ;; HEADER SECTION ;; id = 2063 ;; qr = 1 aa = 0 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 0 nscount = 11 arcount = 3 ;; do = 1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 4096 ;; option: ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (11 records) columbia.edu. 172800 IN NS dns2.itd.umich.edu. columbia.edu. 172800 IN NS auth1.dns.cogentco.com. columbia.edu. 172800 IN NS auth2.dns.cogentco.com. columbia.edu. 172800 IN NS auth4.dns.cogentco.com. columbia.edu. 172800 IN NS auth5.dns.cogentco.com. columbia.edu. 172800 IN NS ns1.lse.ac.uk. columbia.edu. 172800 IN NS ext-ns1.columbia.edu. 9DHS4EP5G85PF9NUFK06HEK0O48QGK77.edu. 86400 IN NSEC3 ( 1 1 0 - 9dql407ijb4jhadmf7cjmufnqmr4df7m NS SOA RRSIG DNSKEY NSEC3PARAM ) 9DHS4EP5G85PF9NUFK06HEK0O48QGK77.edu. 86400 IN RRSIG ( NSEC3 8 2 86400 20220202064912 20220126053912 47450 edu. 1Lr5fzlsCAXriVpzs/p69mAHy3sXTO2dhVyd5E/WIO2ijgzhEJsSDWSC1zBuqTGzdvLCv/4XOa8P iHJUDV2PfL5DayCExZwBSxWMSmVIT4hTsEQTIZQimYrtOgdIWvrd724OSKa7s6jfw5LMQYa28DcN 71eiIKRQM+F+33Y6VNsABX67Kyy+kajR/8rke+nzSE9HzeJKfCLI/pRiN1Pzgg== ) 7U9I8VPKTD9O52GUE9F7VMSHF2O27STK.edu. 86400 IN NSEC3 ( 1 1 0 - 84r3vll0i0qrhsi5n9sj2knksff0jnmp NS DS RRSIG ) 7U9I8VPKTD9O52GUE9F7VMSHF2O27STK.edu. 86400 IN RRSIG ( NSEC3 8 2 86400 20220204065001 20220128054001 47450 edu. G81jb72jxUH4raMvuQbtrU1QOsodkuxXHftWlJPgFkf2nO6ZmIynEBr8Z71zByCjkJA+zXMsJuyp LZ1beaLu3pn8UorwnpdnhWIzvDOfmHMcxRiNMGZkdcdE+h9G1bitYdywDGHAMrkRVt3Vs1rQaetD TdoK/RX4OspeZh4sw+k4hKezODgR9+k8pRc/KSR5nduCqs17QaUd4lf3A5nMwQ== ) ;; ADDITIONAL SECTION (3 records) dns2.itd.umich.edu. 172800 IN A 192.12.80.222 ext-ns1.columbia.edu. 172800 IN A 128.59.1.1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 4096 ;; option:
	Query to h.edu-servers.net for columbia.edu/DNSKEY
	Received 796 bytes from 192.54.112.30
	;; Response received from 192.54.112.30 (796 octets) ;; HEADER SECTION ;; id = 54503 ;; qr = 1 aa = 0 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 0 nscount = 11 arcount = 3 ;; do = 1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 4096 ;; option: ;; QUESTION SECTION (1 record) ;; columbia.edu. IN DNSKEY ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (11 records) columbia.edu. 172800 IN NS dns2.itd.umich.edu. columbia.edu. 172800 IN NS auth1.dns.cogentco.com. columbia.edu. 172800 IN NS auth2.dns.cogentco.com. columbia.edu. 172800 IN NS auth4.dns.cogentco.com. columbia.edu. 172800 IN NS auth5.dns.cogentco.com. columbia.edu. 172800 IN NS ns1.lse.ac.uk. columbia.edu. 172800 IN NS ext-ns1.columbia.edu. 9DHS4EP5G85PF9NUFK06HEK0O48QGK77.edu. 86400 IN NSEC3 ( 1 1 0 - 9dql407ijb4jhadmf7cjmufnqmr4df7m NS SOA RRSIG DNSKEY NSEC3PARAM ) 9DHS4EP5G85PF9NUFK06HEK0O48QGK77.edu. 86400 IN RRSIG ( NSEC3 8 2 86400 20220202064912 20220126053912 47450 edu. 1Lr5fzlsCAXriVpzs/p69mAHy3sXTO2dhVyd5E/WIO2ijgzhEJsSDWSC1zBuqTGzdvLCv/4XOa8P iHJUDV2PfL5DayCExZwBSxWMSmVIT4hTsEQTIZQimYrtOgdIWvrd724OSKa7s6jfw5LMQYa28DcN 71eiIKRQM+F+33Y6VNsABX67Kyy+kajR/8rke+nzSE9HzeJKfCLI/pRiN1Pzgg== ) 7U9I8VPKTD9O52GUE9F7VMSHF2O27STK.edu. 86400 IN NSEC3 ( 1 1 0 - 84r3vll0i0qrhsi5n9sj2knksff0jnmp NS DS RRSIG ) 7U9I8VPKTD9O52GUE9F7VMSHF2O27STK.edu. 86400 IN RRSIG ( NSEC3 8 2 86400 20220204065001 20220128054001 47450 edu. G81jb72jxUH4raMvuQbtrU1QOsodkuxXHftWlJPgFkf2nO6ZmIynEBr8Z71zByCjkJA+zXMsJuyp LZ1beaLu3pn8UorwnpdnhWIzvDOfmHMcxRiNMGZkdcdE+h9G1bitYdywDGHAMrkRVt3Vs1rQaetD TdoK/RX4OspeZh4sw+k4hKezODgR9+k8pRc/KSR5nduCqs17QaUd4lf3A5nMwQ== ) ;; ADDITIONAL SECTION (3 records) dns2.itd.umich.edu. 172800 IN A 192.12.80.222 ext-ns1.columbia.edu. 172800 IN A 128.59.1.1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 4096 ;; option:
	Found child zone columbia.edu

columbia.edu

	Checking DS between edu and columbia.edu
	Query to j.edu-servers.net for columbia.edu/DS
	Received 860 bytes from 192.48.79.30
	;; Response received from 192.48.79.30 (860 octets) ;; HEADER SECTION ;; id = 48923 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 0 nscount = 6 arcount = 1 ;; do = 1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 4096 ;; option: ;; QUESTION SECTION (1 record) ;; columbia.edu. IN DS ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (6 records) 9DHS4EP5G85PF9NUFK06HEK0O48QGK77.edu. 86400 IN NSEC3 ( 1 1 0 - 9dql407ijb4jhadmf7cjmufnqmr4df7m NS SOA RRSIG DNSKEY NSEC3PARAM ) 9DHS4EP5G85PF9NUFK06HEK0O48QGK77.edu. 86400 IN RRSIG ( NSEC3 8 2 86400 20220202064912 20220126053912 47450 edu. 1Lr5fzlsCAXriVpzs/p69mAHy3sXTO2dhVyd5E/WIO2ijgzhEJsSDWSC1zBuqTGzdvLCv/4XOa8P iHJUDV2PfL5DayCExZwBSxWMSmVIT4hTsEQTIZQimYrtOgdIWvrd724OSKa7s6jfw5LMQYa28DcN 71eiIKRQM+F+33Y6VNsABX67Kyy+kajR/8rke+nzSE9HzeJKfCLI/pRiN1Pzgg== ) edu. 900 IN SOA ( a.edu-servers.net. nstld.verisign-grs.com. 1643395367 ;serial 1800 ;refresh 900 ;retry 604800 ;expire 86400 ;minimum ) edu. 900 IN RRSIG ( SOA 8 1 900 20220204184247 20220128173247 47450 edu. TZn8EndS4Dc4z/p2KiSwaaPU37w1/FFl0n3/tP6VOQDG5MeWvIulsubicddhPmxL71tNPjI2oBRO ELqpUdTXrQpb1HH1BMh1ww1k4rqwuf4oUoM/xiRVM/qKVdTkPWIzfcxt/ECI+api1y8cYq85fVUd /WrZ6KlisPoq07t5j8iu9NyIS+feoBU6AXuFR/SO8bL4mJPay5BWpTBjB6Z4cQ== ) 7U9I8VPKTD9O52GUE9F7VMSHF2O27STK.edu. 86400 IN NSEC3 ( 1 1 0 - 84r3vll0i0qrhsi5n9sj2knksff0jnmp NS DS RRSIG ) 7U9I8VPKTD9O52GUE9F7VMSHF2O27STK.edu. 86400 IN RRSIG ( NSEC3 8 2 86400 20220204065001 20220128054001 47450 edu. G81jb72jxUH4raMvuQbtrU1QOsodkuxXHftWlJPgFkf2nO6ZmIynEBr8Z71zByCjkJA+zXMsJuyp LZ1beaLu3pn8UorwnpdnhWIzvDOfmHMcxRiNMGZkdcdE+h9G1bitYdywDGHAMrkRVt3Vs1rQaetD TdoK/RX4OspeZh4sw+k4hKezODgR9+k8pRc/KSR5nduCqs17QaUd4lf3A5nMwQ== ) ;; ADDITIONAL SECTION (1 record) ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 4096 ;; option:
	No DS records found for columbia.edu in the edu zone
	Query to auth1.dns.cogentco.com for columbia.edu/DNSKEY
	Received 96 bytes from 66.28.0.14
	;; Response received from 66.28.0.14 (96 octets) ;; HEADER SECTION ;; id = 9242 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 0 nscount = 1 arcount = 1 ;; do = 1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option: ;; QUESTION SECTION (1 record) ;; columbia.edu. IN DNSKEY ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (1 record) columbia.edu. 300 IN SOA ( ext-ns1.columbia.edu. hostmaster.columbia.edu. 70464 ;serial 3600 ;refresh 1800 ;retry 2419200 ;expire 300 ;minimum ) ;; ADDITIONAL SECTION (1 record) ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option:
	No DNSKEY records found
	Query to ns1.lse.ac.uk for columbia.edu/A
	Received 57 bytes from 158.143.96.8
	;; Response received from 158.143.96.8 (57 octets) ;; HEADER SECTION ;; id = 31044 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 1 nscount = 0 arcount = 1 ;; do = 1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 4000 ;; option: ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (1 record) columbia.edu. 3600 IN A 128.59.105.24 ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 4000 ;; option:
	ns1.lse.ac.uk is authoritative for columbia.edu
	Query to auth5.dns.cogentco.com for columbia.edu/SOA
	Received 510 bytes from 80.91.64.50
	;; Response received from 80.91.64.50 (510 octets) ;; HEADER SECTION ;; id = 48436 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 1 nscount = 7 arcount = 12 ;; do = 1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option: ;; QUESTION SECTION (1 record) ;; columbia.edu. IN SOA ;; ANSWER SECTION (1 record) columbia.edu. 3600 IN SOA ( ext-ns1.columbia.edu. hostmaster.columbia.edu. 70464 ;serial 3600 ;refresh 1800 ;retry 2419200 ;expire 300 ;minimum ) ;; AUTHORITY SECTION (7 records) columbia.edu. 3600 IN NS auth4.dns.cogentco.com. columbia.edu. 3600 IN NS auth5.dns.cogentco.com. columbia.edu. 3600 IN NS auth2.dns.cogentco.com. columbia.edu. 3600 IN NS dns2.itd.umich.edu. columbia.edu. 3600 IN NS ns1.lse.ac.uk. columbia.edu. 3600 IN NS ext-ns1.columbia.edu. columbia.edu. 3600 IN NS auth1.dns.cogentco.com. ;; ADDITIONAL SECTION (12 records) auth1.dns.cogentco.com. 10800 IN A 66.28.0.14 auth2.dns.cogentco.com. 10800 IN A 66.28.0.30 auth4.dns.cogentco.com. 10800 IN A 80.245.32.74 auth5.dns.cogentco.com. 10800 IN A 80.91.64.50 ext-ns1.columbia.edu. 3600 IN A 128.59.1.1 auth1.dns.cogentco.com. 43200 IN AAAA 2001:550:1:a::d auth2.dns.cogentco.com. 43200 IN AAAA 2001:550:1:b::d auth4.dns.cogentco.com. 43200 IN AAAA 2001:978:1:a::d auth5.dns.cogentco.com. 43200 IN AAAA 2001:978:1:b::d ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8::35 ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8:1::1:1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option:
	Query to dns2.itd.umich.edu for columbia.edu/SOA
	Received 350 bytes from 192.12.80.222
	;; Response received from 192.12.80.222 (350 octets) ;; HEADER SECTION ;; id = 52027 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 1 nscount = 7 arcount = 5 ;; do = 1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 4096 ;; option: ;; QUESTION SECTION (1 record) ;; columbia.edu. IN SOA ;; ANSWER SECTION (1 record) columbia.edu. 3600 IN SOA ( ext-ns1.columbia.edu. hostmaster.columbia.edu. 70464 ;serial 3600 ;refresh 1800 ;retry 2419200 ;expire 300 ;minimum ) ;; AUTHORITY SECTION (7 records) columbia.edu. 3600 IN NS auth1.dns.cogentco.com. columbia.edu. 3600 IN NS auth2.dns.cogentco.com. columbia.edu. 3600 IN NS ns1.lse.ac.uk. columbia.edu. 3600 IN NS auth4.dns.cogentco.com. columbia.edu. 3600 IN NS ext-ns1.columbia.edu. columbia.edu. 3600 IN NS auth5.dns.cogentco.com. columbia.edu. 3600 IN NS dns2.itd.umich.edu. ;; ADDITIONAL SECTION (5 records) dns2.itd.umich.edu. 1800 IN A 192.12.80.222 ext-ns1.columbia.edu. 3600 IN A 128.59.1.1 ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8:1::1:1 ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8::35 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 4096 ;; option:
	Query to auth1.dns.cogentco.com for columbia.edu/SOA
	Received 510 bytes from 66.28.0.14
	;; Response received from 66.28.0.14 (510 octets) ;; HEADER SECTION ;; id = 47498 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 1 nscount = 7 arcount = 12 ;; do = 1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option: ;; QUESTION SECTION (1 record) ;; columbia.edu. IN SOA ;; ANSWER SECTION (1 record) columbia.edu. 3600 IN SOA ( ext-ns1.columbia.edu. hostmaster.columbia.edu. 70464 ;serial 3600 ;refresh 1800 ;retry 2419200 ;expire 300 ;minimum ) ;; AUTHORITY SECTION (7 records) columbia.edu. 3600 IN NS auth5.dns.cogentco.com. columbia.edu. 3600 IN NS ext-ns1.columbia.edu. columbia.edu. 3600 IN NS ns1.lse.ac.uk. columbia.edu. 3600 IN NS auth2.dns.cogentco.com. columbia.edu. 3600 IN NS auth1.dns.cogentco.com. columbia.edu. 3600 IN NS auth4.dns.cogentco.com. columbia.edu. 3600 IN NS dns2.itd.umich.edu. ;; ADDITIONAL SECTION (12 records) auth1.dns.cogentco.com. 10800 IN A 66.28.0.14 auth2.dns.cogentco.com. 10800 IN A 66.28.0.30 auth4.dns.cogentco.com. 10800 IN A 80.245.32.74 auth5.dns.cogentco.com. 10800 IN A 80.91.64.50 ext-ns1.columbia.edu. 3600 IN A 128.59.1.1 auth1.dns.cogentco.com. 43200 IN AAAA 2001:550:1:a::d auth2.dns.cogentco.com. 43200 IN AAAA 2001:550:1:b::d auth4.dns.cogentco.com. 43200 IN AAAA 2001:978:1:a::d auth5.dns.cogentco.com. 43200 IN AAAA 2001:978:1:b::d ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8::35 ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8:1::1:1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option:
	Query to ext-ns1.columbia.edu for columbia.edu/SOA
	Received 96 bytes from 128.59.1.1
	;; Response received from 128.59.1.1 (96 octets) ;; HEADER SECTION ;; id = 26391 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 1 nscount = 0 arcount = 1 ;; do = 0 ;; EDNS version 0 ;; flags: 0000 ;; rcode: NOERROR ;; size: 1220 ;; option: ;; QUESTION SECTION (1 record) ;; columbia.edu. IN SOA ;; ANSWER SECTION (1 record) columbia.edu. 3600 IN SOA ( ext-ns1.columbia.edu. hostmaster.columbia.edu. 70464 ;serial 3600 ;refresh 1800 ;retry 2419200 ;expire 300 ;minimum ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; EDNS version 0 ;; flags: 0000 ;; rcode: NOERROR ;; size: 1220 ;; option:
	Query to auth4.dns.cogentco.com for columbia.edu/SOA
	Received 510 bytes from 80.245.32.74
	;; Response received from 80.245.32.74 (510 octets) ;; HEADER SECTION ;; id = 36684 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 1 nscount = 7 arcount = 12 ;; do = 1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option: ;; QUESTION SECTION (1 record) ;; columbia.edu. IN SOA ;; ANSWER SECTION (1 record) columbia.edu. 3600 IN SOA ( ext-ns1.columbia.edu. hostmaster.columbia.edu. 70464 ;serial 3600 ;refresh 1800 ;retry 2419200 ;expire 300 ;minimum ) ;; AUTHORITY SECTION (7 records) columbia.edu. 3600 IN NS ns1.lse.ac.uk. columbia.edu. 3600 IN NS ext-ns1.columbia.edu. columbia.edu. 3600 IN NS auth4.dns.cogentco.com. columbia.edu. 3600 IN NS dns2.itd.umich.edu. columbia.edu. 3600 IN NS auth2.dns.cogentco.com. columbia.edu. 3600 IN NS auth1.dns.cogentco.com. columbia.edu. 3600 IN NS auth5.dns.cogentco.com. ;; ADDITIONAL SECTION (12 records) auth1.dns.cogentco.com. 10800 IN A 66.28.0.14 auth2.dns.cogentco.com. 10800 IN A 66.28.0.30 auth4.dns.cogentco.com. 10800 IN A 80.245.32.74 auth5.dns.cogentco.com. 10800 IN A 80.91.64.50 ext-ns1.columbia.edu. 3600 IN A 128.59.1.1 auth1.dns.cogentco.com. 43200 IN AAAA 2001:550:1:a::d auth2.dns.cogentco.com. 43200 IN AAAA 2001:550:1:b::d auth4.dns.cogentco.com. 43200 IN AAAA 2001:978:1:a::d auth5.dns.cogentco.com. 43200 IN AAAA 2001:978:1:b::d ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8::35 ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8:1::1:1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option:
	Query to auth2.dns.cogentco.com for columbia.edu/SOA
	Received 510 bytes from 66.28.0.30
	;; Response received from 66.28.0.30 (510 octets) ;; HEADER SECTION ;; id = 59918 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 1 nscount = 7 arcount = 12 ;; do = 1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option: ;; QUESTION SECTION (1 record) ;; columbia.edu. IN SOA ;; ANSWER SECTION (1 record) columbia.edu. 3600 IN SOA ( ext-ns1.columbia.edu. hostmaster.columbia.edu. 70464 ;serial 3600 ;refresh 1800 ;retry 2419200 ;expire 300 ;minimum ) ;; AUTHORITY SECTION (7 records) columbia.edu. 3600 IN NS auth4.dns.cogentco.com. columbia.edu. 3600 IN NS auth1.dns.cogentco.com. columbia.edu. 3600 IN NS auth2.dns.cogentco.com. columbia.edu. 3600 IN NS ext-ns1.columbia.edu. columbia.edu. 3600 IN NS dns2.itd.umich.edu. columbia.edu. 3600 IN NS auth5.dns.cogentco.com. columbia.edu. 3600 IN NS ns1.lse.ac.uk. ;; ADDITIONAL SECTION (12 records) auth1.dns.cogentco.com. 10800 IN A 66.28.0.14 auth2.dns.cogentco.com. 10800 IN A 66.28.0.30 auth4.dns.cogentco.com. 10800 IN A 80.245.32.74 auth5.dns.cogentco.com. 10800 IN A 80.91.64.50 ext-ns1.columbia.edu. 3600 IN A 128.59.1.1 auth1.dns.cogentco.com. 43200 IN AAAA 2001:550:1:a::d auth2.dns.cogentco.com. 43200 IN AAAA 2001:550:1:b::d auth4.dns.cogentco.com. 43200 IN AAAA 2001:978:1:a::d auth5.dns.cogentco.com. 43200 IN AAAA 2001:978:1:b::d ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8::35 ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8:1::1:1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option:
	Query to ns1.lse.ac.uk for columbia.edu/A
	Received 57 bytes from 158.143.96.8
	;; Response received from 158.143.96.8 (57 octets) ;; HEADER SECTION ;; id = 59642 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 1 nscount = 0 arcount = 1 ;; do = 1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 4000 ;; option: ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (1 record) columbia.edu. 3600 IN A 128.59.105.24 ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 4000 ;; option:
	columbia.edu A RR has value 128.59.105.24
	No RRSIGs found

columbia.edu

	Query to dns2.itd.umich.edu for columbia.edu/A
	Received 319 bytes from 192.12.80.222
	;; Response received from 192.12.80.222 (319 octets) ;; HEADER SECTION ;; id = 7734 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 1 nscount = 7 arcount = 5 ;; do = 1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 4096 ;; option: ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (1 record) columbia.edu. 3600 IN A 128.59.105.24 ;; AUTHORITY SECTION (7 records) columbia.edu. 3600 IN NS dns2.itd.umich.edu. columbia.edu. 3600 IN NS auth5.dns.cogentco.com. columbia.edu. 3600 IN NS ext-ns1.columbia.edu. columbia.edu. 3600 IN NS auth1.dns.cogentco.com. columbia.edu. 3600 IN NS auth4.dns.cogentco.com. columbia.edu. 3600 IN NS auth2.dns.cogentco.com. columbia.edu. 3600 IN NS ns1.lse.ac.uk. ;; ADDITIONAL SECTION (5 records) dns2.itd.umich.edu. 1800 IN A 192.12.80.222 ext-ns1.columbia.edu. 3600 IN A 128.59.1.1 ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8::35 ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8:1::1:1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 4096 ;; option:
	dns2.itd.umich.edu is authoritative for columbia.edu
	Query to dns2.itd.umich.edu for columbia.edu/A
	Received 319 bytes from 192.12.80.222
	;; Response received from 192.12.80.222 (319 octets) ;; HEADER SECTION ;; id = 44904 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 1 nscount = 7 arcount = 5 ;; do = 1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 4096 ;; option: ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (1 record) columbia.edu. 3600 IN A 128.59.105.24 ;; AUTHORITY SECTION (7 records) columbia.edu. 3600 IN NS auth2.dns.cogentco.com. columbia.edu. 3600 IN NS dns2.itd.umich.edu. columbia.edu. 3600 IN NS auth5.dns.cogentco.com. columbia.edu. 3600 IN NS auth1.dns.cogentco.com. columbia.edu. 3600 IN NS auth4.dns.cogentco.com. columbia.edu. 3600 IN NS ns1.lse.ac.uk. columbia.edu. 3600 IN NS ext-ns1.columbia.edu. ;; ADDITIONAL SECTION (5 records) dns2.itd.umich.edu. 1800 IN A 192.12.80.222 ext-ns1.columbia.edu. 3600 IN A 128.59.1.1 ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8:1::1:1 ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8::35 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 4096 ;; option:
	columbia.edu A RR has value 128.59.105.24
	No RRSIGs found

columbia.edu

	Query to auth2.dns.cogentco.com for columbia.edu/A
	Received 479 bytes from 66.28.0.30
	;; Response received from 66.28.0.30 (479 octets) ;; HEADER SECTION ;; id = 5427 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 1 nscount = 7 arcount = 12 ;; do = 1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option: ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (1 record) columbia.edu. 3600 IN A 128.59.105.24 ;; AUTHORITY SECTION (7 records) columbia.edu. 3600 IN NS ns1.lse.ac.uk. columbia.edu. 3600 IN NS ext-ns1.columbia.edu. columbia.edu. 3600 IN NS auth2.dns.cogentco.com. columbia.edu. 3600 IN NS auth1.dns.cogentco.com. columbia.edu. 3600 IN NS auth4.dns.cogentco.com. columbia.edu. 3600 IN NS dns2.itd.umich.edu. columbia.edu. 3600 IN NS auth5.dns.cogentco.com. ;; ADDITIONAL SECTION (12 records) auth1.dns.cogentco.com. 10800 IN A 66.28.0.14 auth2.dns.cogentco.com. 10800 IN A 66.28.0.30 auth4.dns.cogentco.com. 10800 IN A 80.245.32.74 auth5.dns.cogentco.com. 10800 IN A 80.91.64.50 ext-ns1.columbia.edu. 3600 IN A 128.59.1.1 auth1.dns.cogentco.com. 43200 IN AAAA 2001:550:1:a::d auth2.dns.cogentco.com. 43200 IN AAAA 2001:550:1:b::d auth4.dns.cogentco.com. 43200 IN AAAA 2001:978:1:a::d auth5.dns.cogentco.com. 43200 IN AAAA 2001:978:1:b::d ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8::35 ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8:1::1:1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option:
	auth2.dns.cogentco.com is authoritative for columbia.edu
	Query to auth2.dns.cogentco.com for columbia.edu/A
	Received 479 bytes from 66.28.0.30
	;; Response received from 66.28.0.30 (479 octets) ;; HEADER SECTION ;; id = 58221 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 1 nscount = 7 arcount = 12 ;; do = 1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option: ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (1 record) columbia.edu. 3600 IN A 128.59.105.24 ;; AUTHORITY SECTION (7 records) columbia.edu. 3600 IN NS dns2.itd.umich.edu. columbia.edu. 3600 IN NS auth4.dns.cogentco.com. columbia.edu. 3600 IN NS ns1.lse.ac.uk. columbia.edu. 3600 IN NS auth1.dns.cogentco.com. columbia.edu. 3600 IN NS auth2.dns.cogentco.com. columbia.edu. 3600 IN NS auth5.dns.cogentco.com. columbia.edu. 3600 IN NS ext-ns1.columbia.edu. ;; ADDITIONAL SECTION (12 records) auth1.dns.cogentco.com. 10800 IN A 66.28.0.14 auth2.dns.cogentco.com. 10800 IN A 66.28.0.30 auth4.dns.cogentco.com. 10800 IN A 80.245.32.74 auth5.dns.cogentco.com. 10800 IN A 80.91.64.50 ext-ns1.columbia.edu. 3600 IN A 128.59.1.1 auth1.dns.cogentco.com. 43200 IN AAAA 2001:550:1:a::d auth2.dns.cogentco.com. 43200 IN AAAA 2001:550:1:b::d auth4.dns.cogentco.com. 43200 IN AAAA 2001:978:1:a::d auth5.dns.cogentco.com. 43200 IN AAAA 2001:978:1:b::d ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8::35 ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8:1::1:1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option:
	columbia.edu A RR has value 128.59.105.24
	No RRSIGs found

columbia.edu

	Query to auth1.dns.cogentco.com for columbia.edu/A
	Received 479 bytes from 66.28.0.14
	;; Response received from 66.28.0.14 (479 octets) ;; HEADER SECTION ;; id = 1606 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 1 nscount = 7 arcount = 12 ;; do = 1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option: ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (1 record) columbia.edu. 3600 IN A 128.59.105.24 ;; AUTHORITY SECTION (7 records) columbia.edu. 3600 IN NS auth1.dns.cogentco.com. columbia.edu. 3600 IN NS dns2.itd.umich.edu. columbia.edu. 3600 IN NS ns1.lse.ac.uk. columbia.edu. 3600 IN NS auth4.dns.cogentco.com. columbia.edu. 3600 IN NS ext-ns1.columbia.edu. columbia.edu. 3600 IN NS auth5.dns.cogentco.com. columbia.edu. 3600 IN NS auth2.dns.cogentco.com. ;; ADDITIONAL SECTION (12 records) auth1.dns.cogentco.com. 10800 IN A 66.28.0.14 auth2.dns.cogentco.com. 10800 IN A 66.28.0.30 auth4.dns.cogentco.com. 10800 IN A 80.245.32.74 auth5.dns.cogentco.com. 10800 IN A 80.91.64.50 ext-ns1.columbia.edu. 3600 IN A 128.59.1.1 auth1.dns.cogentco.com. 43200 IN AAAA 2001:550:1:a::d auth2.dns.cogentco.com. 43200 IN AAAA 2001:550:1:b::d auth4.dns.cogentco.com. 43200 IN AAAA 2001:978:1:a::d auth5.dns.cogentco.com. 43200 IN AAAA 2001:978:1:b::d ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8:1::1:1 ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8::35 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option:
	auth1.dns.cogentco.com is authoritative for columbia.edu
	Query to auth1.dns.cogentco.com for columbia.edu/A
	Received 479 bytes from 66.28.0.14
	;; Response received from 66.28.0.14 (479 octets) ;; HEADER SECTION ;; id = 43834 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 1 nscount = 7 arcount = 12 ;; do = 1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option: ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (1 record) columbia.edu. 3600 IN A 128.59.105.24 ;; AUTHORITY SECTION (7 records) columbia.edu. 3600 IN NS ns1.lse.ac.uk. columbia.edu. 3600 IN NS dns2.itd.umich.edu. columbia.edu. 3600 IN NS ext-ns1.columbia.edu. columbia.edu. 3600 IN NS auth5.dns.cogentco.com. columbia.edu. 3600 IN NS auth2.dns.cogentco.com. columbia.edu. 3600 IN NS auth4.dns.cogentco.com. columbia.edu. 3600 IN NS auth1.dns.cogentco.com. ;; ADDITIONAL SECTION (12 records) auth1.dns.cogentco.com. 10800 IN A 66.28.0.14 auth2.dns.cogentco.com. 10800 IN A 66.28.0.30 auth4.dns.cogentco.com. 10800 IN A 80.245.32.74 auth5.dns.cogentco.com. 10800 IN A 80.91.64.50 ext-ns1.columbia.edu. 3600 IN A 128.59.1.1 auth1.dns.cogentco.com. 43200 IN AAAA 2001:550:1:a::d auth2.dns.cogentco.com. 43200 IN AAAA 2001:550:1:b::d auth4.dns.cogentco.com. 43200 IN AAAA 2001:978:1:a::d auth5.dns.cogentco.com. 43200 IN AAAA 2001:978:1:b::d ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8::35 ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8:1::1:1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option:
	columbia.edu A RR has value 128.59.105.24
	No RRSIGs found

columbia.edu

	Query to auth4.dns.cogentco.com for columbia.edu/A
	Received 479 bytes from 80.245.32.74
	;; Response received from 80.245.32.74 (479 octets) ;; HEADER SECTION ;; id = 6248 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 1 nscount = 7 arcount = 12 ;; do = 1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option: ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (1 record) columbia.edu. 3600 IN A 128.59.105.24 ;; AUTHORITY SECTION (7 records) columbia.edu. 3600 IN NS auth2.dns.cogentco.com. columbia.edu. 3600 IN NS dns2.itd.umich.edu. columbia.edu. 3600 IN NS auth5.dns.cogentco.com. columbia.edu. 3600 IN NS auth4.dns.cogentco.com. columbia.edu. 3600 IN NS ns1.lse.ac.uk. columbia.edu. 3600 IN NS auth1.dns.cogentco.com. columbia.edu. 3600 IN NS ext-ns1.columbia.edu. ;; ADDITIONAL SECTION (12 records) auth1.dns.cogentco.com. 10800 IN A 66.28.0.14 auth2.dns.cogentco.com. 10800 IN A 66.28.0.30 auth4.dns.cogentco.com. 10800 IN A 80.245.32.74 auth5.dns.cogentco.com. 10800 IN A 80.91.64.50 ext-ns1.columbia.edu. 3600 IN A 128.59.1.1 auth1.dns.cogentco.com. 43200 IN AAAA 2001:550:1:a::d auth2.dns.cogentco.com. 43200 IN AAAA 2001:550:1:b::d auth4.dns.cogentco.com. 43200 IN AAAA 2001:978:1:a::d auth5.dns.cogentco.com. 43200 IN AAAA 2001:978:1:b::d ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8:1::1:1 ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8::35 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option:
	auth4.dns.cogentco.com is authoritative for columbia.edu
	Query to auth4.dns.cogentco.com for columbia.edu/A
	Received 479 bytes from 80.245.32.74
	;; Response received from 80.245.32.74 (479 octets) ;; HEADER SECTION ;; id = 57533 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 1 nscount = 7 arcount = 12 ;; do = 1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option: ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (1 record) columbia.edu. 3600 IN A 128.59.105.24 ;; AUTHORITY SECTION (7 records) columbia.edu. 3600 IN NS auth5.dns.cogentco.com. columbia.edu. 3600 IN NS dns2.itd.umich.edu. columbia.edu. 3600 IN NS auth1.dns.cogentco.com. columbia.edu. 3600 IN NS auth2.dns.cogentco.com. columbia.edu. 3600 IN NS ns1.lse.ac.uk. columbia.edu. 3600 IN NS ext-ns1.columbia.edu. columbia.edu. 3600 IN NS auth4.dns.cogentco.com. ;; ADDITIONAL SECTION (12 records) auth1.dns.cogentco.com. 10800 IN A 66.28.0.14 auth2.dns.cogentco.com. 10800 IN A 66.28.0.30 auth4.dns.cogentco.com. 10800 IN A 80.245.32.74 auth5.dns.cogentco.com. 10800 IN A 80.91.64.50 ext-ns1.columbia.edu. 3600 IN A 128.59.1.1 auth1.dns.cogentco.com. 43200 IN AAAA 2001:550:1:a::d auth2.dns.cogentco.com. 43200 IN AAAA 2001:550:1:b::d auth4.dns.cogentco.com. 43200 IN AAAA 2001:978:1:a::d auth5.dns.cogentco.com. 43200 IN AAAA 2001:978:1:b::d ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8:1::1:1 ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8::35 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option:
	columbia.edu A RR has value 128.59.105.24
	No RRSIGs found

columbia.edu

	Query to auth5.dns.cogentco.com for columbia.edu/A
	Received 479 bytes from 80.91.64.50
	;; Response received from 80.91.64.50 (479 octets) ;; HEADER SECTION ;; id = 533 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 1 nscount = 7 arcount = 12 ;; do = 1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option: ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (1 record) columbia.edu. 3600 IN A 128.59.105.24 ;; AUTHORITY SECTION (7 records) columbia.edu. 3600 IN NS ns1.lse.ac.uk. columbia.edu. 3600 IN NS auth2.dns.cogentco.com. columbia.edu. 3600 IN NS auth4.dns.cogentco.com. columbia.edu. 3600 IN NS auth1.dns.cogentco.com. columbia.edu. 3600 IN NS auth5.dns.cogentco.com. columbia.edu. 3600 IN NS ext-ns1.columbia.edu. columbia.edu. 3600 IN NS dns2.itd.umich.edu. ;; ADDITIONAL SECTION (12 records) auth1.dns.cogentco.com. 10800 IN A 66.28.0.14 auth2.dns.cogentco.com. 10800 IN A 66.28.0.30 auth4.dns.cogentco.com. 10800 IN A 80.245.32.74 auth5.dns.cogentco.com. 10800 IN A 80.91.64.50 ext-ns1.columbia.edu. 3600 IN A 128.59.1.1 auth1.dns.cogentco.com. 43200 IN AAAA 2001:550:1:a::d auth2.dns.cogentco.com. 43200 IN AAAA 2001:550:1:b::d auth4.dns.cogentco.com. 43200 IN AAAA 2001:978:1:a::d auth5.dns.cogentco.com. 43200 IN AAAA 2001:978:1:b::d ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8::35 ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8:1::1:1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option:
	auth5.dns.cogentco.com is authoritative for columbia.edu
	Query to auth5.dns.cogentco.com for columbia.edu/A
	Received 479 bytes from 80.91.64.50
	;; Response received from 80.91.64.50 (479 octets) ;; HEADER SECTION ;; id = 45157 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 1 nscount = 7 arcount = 12 ;; do = 1 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option: ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (1 record) columbia.edu. 3600 IN A 128.59.105.24 ;; AUTHORITY SECTION (7 records) columbia.edu. 3600 IN NS auth4.dns.cogentco.com. columbia.edu. 3600 IN NS ns1.lse.ac.uk. columbia.edu. 3600 IN NS dns2.itd.umich.edu. columbia.edu. 3600 IN NS auth1.dns.cogentco.com. columbia.edu. 3600 IN NS auth2.dns.cogentco.com. columbia.edu. 3600 IN NS ext-ns1.columbia.edu. columbia.edu. 3600 IN NS auth5.dns.cogentco.com. ;; ADDITIONAL SECTION (12 records) auth1.dns.cogentco.com. 10800 IN A 66.28.0.14 auth2.dns.cogentco.com. 10800 IN A 66.28.0.30 auth4.dns.cogentco.com. 10800 IN A 80.245.32.74 auth5.dns.cogentco.com. 10800 IN A 80.91.64.50 ext-ns1.columbia.edu. 3600 IN A 128.59.1.1 auth1.dns.cogentco.com. 43200 IN AAAA 2001:550:1:a::d auth2.dns.cogentco.com. 43200 IN AAAA 2001:550:1:b::d auth4.dns.cogentco.com. 43200 IN AAAA 2001:978:1:a::d auth5.dns.cogentco.com. 43200 IN AAAA 2001:978:1:b::d ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8:1::1:1 ext-ns1.columbia.edu. 3600 IN AAAA 2001:18d8::35 ;; EDNS version 0 ;; flags: 8000 ;; rcode: NOERROR ;; size: 1232 ;; option:
	columbia.edu A RR has value 128.59.105.24
	No RRSIGs found

columbia.edu

	Query to ext-ns1.columbia.edu for columbia.edu/A
	Received 57 bytes from 128.59.1.1
	;; Response received from 128.59.1.1 (57 octets) ;; HEADER SECTION ;; id = 55731 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 1 nscount = 0 arcount = 1 ;; do = 0 ;; EDNS version 0 ;; flags: 0000 ;; rcode: NOERROR ;; size: 1220 ;; option: ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (1 record) columbia.edu. 3600 IN A 128.59.105.24 ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; EDNS version 0 ;; flags: 0000 ;; rcode: NOERROR ;; size: 1220 ;; option:
	ext-ns1.columbia.edu is authoritative for columbia.edu
	Query to ext-ns1.columbia.edu for columbia.edu/A
	Received 57 bytes from 128.59.1.1
	;; Response received from 128.59.1.1 (57 octets) ;; HEADER SECTION ;; id = 26702 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; qdcount = 1 ancount = 1 nscount = 0 arcount = 1 ;; do = 0 ;; EDNS version 0 ;; flags: 0000 ;; rcode: NOERROR ;; size: 1220 ;; option: ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (1 record) columbia.edu. 3600 IN A 128.59.105.24 ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; EDNS version 0 ;; flags: 0000 ;; rcode: NOERROR ;; size: 1220 ;; option:
	columbia.edu A RR has value 128.59.105.24
	No RRSIGs found

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