DNSSEC Debugger - columbia.edu

Domain Name:

Time: 2025-11-10 00:33:56 UTC

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 g.root-servers.net for ./DNSKEY
	Received 1141 bytes from 192.112.36.4
	;; Response received from [192.112.36.4] 1141 octets ;; HEADER SECTION ;; id = 62233 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 4 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; . IN DNSKEY ;; ANSWER SECTION (4 records) . 172800 IN DNSKEY ( 256 3 8 AwEAAeuS7hMRZ7muj1c/ew2DoavxkBw3jUG5R79pKVDI39fxvlD1HfJYGJERnXuV4SrQfUPzWw/l t5Axb0EqXL/sQ2ZyntVmwQwoSXi2l9smlIKh2UrkTmmozRCPe7GS4fZTE4Ew7AV4YprTLgVmxiGP 4unRuXkYOgQJXCIBpVCmEdUli6X2sm0i5ZilU/Q+rX3RDw+eYPP7K0cJnJ+ZnvQDy14+BFtreWl9 enNQljgGpBp26lEp1z7AbvUfzkQNVCVGaM8jEaCSALXiROlwCQMOdj+tpLXFf99kdJnTQw2cpEr1 uGs/yENAJpoGhbjZAoIkXzDUBSlfFeYz7FWzH6gIe7M= ) ; keytag 61809 . 172800 IN DNSKEY ( 257 3 8 AwEAAa96jeuknZlaeSrvyAJj6ZHv28hhOKkx3rLGXVaC6rXTsDc449/cidltpkyGwCJNnOAlFNKF 2jBosZBU5eeHspaQWOmOElZsjICMQMC3aeHbGiShvZsx4wMYSjH8e7Vrhbu6irwCzVBApESjbUdp WWmEnhathWu1jo+siFUiRAAxm9qyJNg/wOZqqzL/dL/q8PkcRU5oUKEpUge71M3ej2/7CPqpdVwu MoTvoB+ZOT4YeGyxMvHmbrxlFzGOHOijtzN+u1TQNatX2XBuzZNQ1K+s2CXkPIZo7s6JgZyvaBev YtxPvYLw4z9mR7K2vaF18UYH9Z9GNUUeayffKC73PYc= ) ; keytag 38696 . 172800 IN DNSKEY ( 257 3 8 AwEAAaz/tAm8yTn4Mfeh5eyI96WSVexTBAvkMgJzkKTOiW1vkIbzxeF3+/4RgWOq7HrxRixHlFlE xOLAJr5emLvN7SWXgnLh4+B5xQlNVz8Og8kvArMtNROxVQuCaSnIDdD5LKyWbRd2n9WGe2R8PzgC mr3EgVLrjyBxWezF0jLHwVN8efS3rCj/EWgvIWgb9tarpVUDK/b58Da+sqqls3eNbuv7pr+eoZG+ SrDK6nWeL3c6H5Apxz7LjVc1uTIdsIXxuOLYA4/ilBmSVIzuDWfdRUfhHdY6+cn8HFRm+2hM8AnX GXws9555KrUB5qihylGa8subX2Nn6UwNR1AkUTV74bU= ) ; keytag 20326 . 172800 IN RRSIG ( DNSKEY 8 0 172800 20251121000000 20251031000000 20326 . qnzPUNeV8plQe0Se5Fa0uHS0Ygf4DSnEekaMeH7GQRbNhk6ntkneJFKUN+EBJQfd/JoaY//18qf4 G6YrWE/a+FwJ5oefafEhuJWhITrXMle9e4oy4Z7sjb7e1ajwGSKlcfp0Rsulv/aPlLLfl+4jUijr zzZUvUJA10LzOwswvjI16xA3HMG9rEh0mKY0RywLI+R5NkYgDzY0QGL9BMaUHWNV+eTFBmMpmg3j jKGnIg8jmFhqcypUqLXW7md/oO+k0A8QG39nGvhx7rVDUoaQd7atJH2jtzGeXW8n/XI/ncI9fSoX rLXu6NvJY5bX6dXI9ypg+sFnkF7Fd4TdZ8AasA== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 3 DNSKEY records for .
	`. 172800 IN DNSKEY ( 256 3 8 AwEAAeuS7hMRZ7muj1c/ew2DoavxkBw3jUG5R79pKVDI39fxvlD1HfJYGJERnXuV4SrQfUPzWw/l t5Axb0EqXL/sQ2ZyntVmwQwoSXi2l9smlIKh2UrkTmmozRCPe7GS4fZTE4Ew7AV4YprTLgVmxiGP 4unRuXkYOgQJXCIBpVCmEdUli6X2sm0i5ZilU/Q+rX3RDw+eYPP7K0cJnJ+ZnvQDy14+BFtreWl9 enNQljgGpBp26lEp1z7AbvUfzkQNVCVGaM8jEaCSALXiROlwCQMOdj+tpLXFf99kdJnTQw2cpEr1 uGs/yENAJpoGhbjZAoIkXzDUBSlfFeYz7FWzH6gIe7M= ) ; keytag 61809`
	`. 172800 IN DNSKEY ( 257 3 8 AwEAAa96jeuknZlaeSrvyAJj6ZHv28hhOKkx3rLGXVaC6rXTsDc449/cidltpkyGwCJNnOAlFNKF 2jBosZBU5eeHspaQWOmOElZsjICMQMC3aeHbGiShvZsx4wMYSjH8e7Vrhbu6irwCzVBApESjbUdp WWmEnhathWu1jo+siFUiRAAxm9qyJNg/wOZqqzL/dL/q8PkcRU5oUKEpUge71M3ej2/7CPqpdVwu MoTvoB+ZOT4YeGyxMvHmbrxlFzGOHOijtzN+u1TQNatX2XBuzZNQ1K+s2CXkPIZo7s6JgZyvaBev YtxPvYLw4z9mR7K2vaF18UYH9Z9GNUUeayffKC73PYc= ) ; keytag 38696`
	`. 172800 IN DNSKEY ( 257 3 8 AwEAAaz/tAm8yTn4Mfeh5eyI96WSVexTBAvkMgJzkKTOiW1vkIbzxeF3+/4RgWOq7HrxRixHlFlE xOLAJr5emLvN7SWXgnLh4+B5xQlNVz8Og8kvArMtNROxVQuCaSnIDdD5LKyWbRd2n9WGe2R8PzgC mr3EgVLrjyBxWezF0jLHwVN8efS3rCj/EWgvIWgb9tarpVUDK/b58Da+sqqls3eNbuv7pr+eoZG+ SrDK6nWeL3c6H5Apxz7LjVc1uTIdsIXxuOLYA4/ilBmSVIzuDWfdRUfhHdY6+cn8HFRm+2hM8AnX GXws9555KrUB5qihylGa8subX2Nn6UwNR1AkUTV74bU= ) ; keytag 20326`
	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 20251121000000 20251031000000 20326 . qnzPUNeV8plQe0Se5Fa0uHS0Ygf4DSnEekaMeH7GQRbNhk6ntkneJFKUN+EBJQfd/JoaY//18qf4 G6YrWE/a+FwJ5oefafEhuJWhITrXMle9e4oy4Z7sjb7e1ajwGSKlcfp0Rsulv/aPlLLfl+4jUijr zzZUvUJA10LzOwswvjI16xA3HMG9rEh0mKY0RywLI+R5NkYgDzY0QGL9BMaUHWNV+eTFBmMpmg3j jKGnIg8jmFhqcypUqLXW7md/oO+k0A8QG39nGvhx7rVDUoaQd7atJH2jtzGeXW8n/XI/ncI9fSoX rLXu6NvJY5bX6dXI9ypg+sFnkF7Fd4TdZ8AasA== )`
	RRSIG=20326 and DNSKEY=20326/SEP verifies the DNSKEY RRset
	DNSKEY=61809 is now in the chain-of-trust
	DNSKEY=38696/SEP is now in the chain-of-trust
	Query to f.root-servers.net for columbia.edu/A
	Received 1171 bytes from 192.5.5.241
	;; Response received from [192.5.5.241] 1171 octets ;; HEADER SECTION ;; id = 57677 ;; qr = 1 aa = 0 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 0 ;; nscount = 15 arcount = 27 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1472, ;; "OPTIONS": [ ] ;; } ;; 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 ( 35663 13 2 a2e1614291831a4746b5ac52b4b345357687271e85353082741f1cf3d06a4c1d ) edu. 86400 IN RRSIG ( DS 8 1 86400 20251122170000 20251109160000 61809 . FrBwwGEcFdObGfn1T+YgMVRMjfub4F+9nctxNmPBFd7woQDZ+EGVwC8gYD+ScCaK5nTHRgBNqd76 ueM68sYIRSNA16CXxdEzBzUJJqUZwf3OV7LV2Y/tOjkSZsF4YnxkxCrMcuZLoqEG8RUzQbU0lj9b 04UPRABj//8LC5gT/EVWYpSzzDe/704gdxTy+14w3jTwEUr1jH9v19rjr4VNjN/HbF4FT8kiGWzA X3q9ZyY1Wl2KrdAkV8HL0AUwjN0IJrjV5M71Auq66cqsT7gqr1JLawRkJGumHT65GRkxkwqY3BU/ MxGq9C38mXkZhwnAkd+MxpWMhDdtKXPWWweOfQ== ) ;; ADDITIONAL SECTION (27 records) a.edu-servers.net. 172800 IN A 192.5.6.30 a.edu-servers.net. 172800 IN AAAA 2001:503:a83e::2:30 b.edu-servers.net. 172800 IN A 192.33.14.30 b.edu-servers.net. 172800 IN AAAA 2001:503:231d::2:30 c.edu-servers.net. 172800 IN A 192.26.92.30 c.edu-servers.net. 172800 IN AAAA 2001:503:83eb::30 d.edu-servers.net. 172800 IN A 192.31.80.30 d.edu-servers.net. 172800 IN AAAA 2001:500:856e::30 e.edu-servers.net. 172800 IN A 192.12.94.30 e.edu-servers.net. 172800 IN AAAA 2001:502:1ca1::30 f.edu-servers.net. 172800 IN A 192.35.51.30 f.edu-servers.net. 172800 IN AAAA 2001:503:d414::30 g.edu-servers.net. 172800 IN A 192.42.93.30 g.edu-servers.net. 172800 IN AAAA 2001:503:eea3::30 h.edu-servers.net. 172800 IN A 192.54.112.30 h.edu-servers.net. 172800 IN AAAA 2001:502:8cc::30 i.edu-servers.net. 172800 IN A 192.43.172.30 i.edu-servers.net. 172800 IN AAAA 2001:503:39c1::30 j.edu-servers.net. 172800 IN A 192.48.79.30 j.edu-servers.net. 172800 IN AAAA 2001:502:7094::30 k.edu-servers.net. 172800 IN A 192.52.178.30 k.edu-servers.net. 172800 IN AAAA 2001:503:d2d::30 l.edu-servers.net. 172800 IN A 192.41.162.30 l.edu-servers.net. 172800 IN AAAA 2001:500:d937::30 m.edu-servers.net. 172800 IN A 192.55.83.30 m.edu-servers.net. 172800 IN AAAA 2001:501:b1f9::30 ;; { "EDNS-VERSION": 0 }
	Query to c.root-servers.net for edu/DNSKEY
	Received 1162 bytes from 192.33.4.12
	;; Response received from [192.33.4.12] 1162 octets ;; HEADER SECTION ;; id = 8956 ;; qr = 1 aa = 0 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 0 ;; nscount = 15 arcount = 27 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; edu. IN DNSKEY ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (15 records) edu. 172800 IN NS j.edu-servers.net. edu. 172800 IN NS b.edu-servers.net. edu. 172800 IN NS l.edu-servers.net. edu. 172800 IN NS d.edu-servers.net. edu. 172800 IN NS e.edu-servers.net. edu. 172800 IN NS a.edu-servers.net. edu. 172800 IN NS h.edu-servers.net. edu. 172800 IN NS g.edu-servers.net. edu. 172800 IN NS i.edu-servers.net. edu. 172800 IN NS f.edu-servers.net. edu. 172800 IN NS k.edu-servers.net. edu. 172800 IN NS c.edu-servers.net. edu. 172800 IN NS m.edu-servers.net. edu. 86400 IN DS ( 35663 13 2 a2e1614291831a4746b5ac52b4b345357687271e85353082741f1cf3d06a4c1d ) edu. 86400 IN RRSIG ( DS 8 1 86400 20251122170000 20251109160000 61809 . FrBwwGEcFdObGfn1T+YgMVRMjfub4F+9nctxNmPBFd7woQDZ+EGVwC8gYD+ScCaK5nTHRgBNqd76 ueM68sYIRSNA16CXxdEzBzUJJqUZwf3OV7LV2Y/tOjkSZsF4YnxkxCrMcuZLoqEG8RUzQbU0lj9b 04UPRABj//8LC5gT/EVWYpSzzDe/704gdxTy+14w3jTwEUr1jH9v19rjr4VNjN/HbF4FT8kiGWzA X3q9ZyY1Wl2KrdAkV8HL0AUwjN0IJrjV5M71Auq66cqsT7gqr1JLawRkJGumHT65GRkxkwqY3BU/ MxGq9C38mXkZhwnAkd+MxpWMhDdtKXPWWweOfQ== ) ;; ADDITIONAL SECTION (27 records) m.edu-servers.net. 172800 IN A 192.55.83.30 l.edu-servers.net. 172800 IN A 192.41.162.30 k.edu-servers.net. 172800 IN A 192.52.178.30 j.edu-servers.net. 172800 IN A 192.48.79.30 i.edu-servers.net. 172800 IN A 192.43.172.30 h.edu-servers.net. 172800 IN A 192.54.112.30 g.edu-servers.net. 172800 IN A 192.42.93.30 f.edu-servers.net. 172800 IN A 192.35.51.30 e.edu-servers.net. 172800 IN A 192.12.94.30 d.edu-servers.net. 172800 IN A 192.31.80.30 c.edu-servers.net. 172800 IN A 192.26.92.30 b.edu-servers.net. 172800 IN A 192.33.14.30 a.edu-servers.net. 172800 IN A 192.5.6.30 m.edu-servers.net. 172800 IN AAAA 2001:501:b1f9::30 l.edu-servers.net. 172800 IN AAAA 2001:500:d937::30 k.edu-servers.net. 172800 IN AAAA 2001:503:d2d::30 j.edu-servers.net. 172800 IN AAAA 2001:502:7094::30 i.edu-servers.net. 172800 IN AAAA 2001:503:39c1::30 h.edu-servers.net. 172800 IN AAAA 2001:502:8cc::30 g.edu-servers.net. 172800 IN AAAA 2001:503:eea3::30 f.edu-servers.net. 172800 IN AAAA 2001:503:d414::30 e.edu-servers.net. 172800 IN AAAA 2001:502:1ca1::30 d.edu-servers.net. 172800 IN AAAA 2001:500:856e::30 c.edu-servers.net. 172800 IN AAAA 2001:503:83eb::30 b.edu-servers.net. 172800 IN AAAA 2001:503:231d::2:30 a.edu-servers.net. 172800 IN AAAA 2001:503:a83e::2:30 ;; { "EDNS-VERSION": 0 }
	Found child zone edu

edu

	Checking DS between . and edu
	Query to g.root-servers.net for edu/DS
	Received 367 bytes from 192.112.36.4
	;; Response received from [192.112.36.4] 367 octets ;; HEADER SECTION ;; id = 54938 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; edu. IN DS ;; ANSWER SECTION (2 records) edu. 86400 IN DS ( 35663 13 2 a2e1614291831a4746b5ac52b4b345357687271e85353082741f1cf3d06a4c1d ) edu. 86400 IN RRSIG ( DS 8 1 86400 20251122170000 20251109160000 61809 . FrBwwGEcFdObGfn1T+YgMVRMjfub4F+9nctxNmPBFd7woQDZ+EGVwC8gYD+ScCaK5nTHRgBNqd76 ueM68sYIRSNA16CXxdEzBzUJJqUZwf3OV7LV2Y/tOjkSZsF4YnxkxCrMcuZLoqEG8RUzQbU0lj9b 04UPRABj//8LC5gT/EVWYpSzzDe/704gdxTy+14w3jTwEUr1jH9v19rjr4VNjN/HbF4FT8kiGWzA X3q9ZyY1Wl2KrdAkV8HL0AUwjN0IJrjV5M71Auq66cqsT7gqr1JLawRkJGumHT65GRkxkwqY3BU/ MxGq9C38mXkZhwnAkd+MxpWMhDdtKXPWWweOfQ== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 1 DS records for edu in the . zone
	DS=35663/SHA-256 has algorithm ECDSAP256SHA256
	Found 1 RRSIGs over DS RRset
	`edu. 86400 IN RRSIG ( DS 8 1 86400 20251122170000 20251109160000 61809 . FrBwwGEcFdObGfn1T+YgMVRMjfub4F+9nctxNmPBFd7woQDZ+EGVwC8gYD+ScCaK5nTHRgBNqd76 ueM68sYIRSNA16CXxdEzBzUJJqUZwf3OV7LV2Y/tOjkSZsF4YnxkxCrMcuZLoqEG8RUzQbU0lj9b 04UPRABj//8LC5gT/EVWYpSzzDe/704gdxTy+14w3jTwEUr1jH9v19rjr4VNjN/HbF4FT8kiGWzA X3q9ZyY1Wl2KrdAkV8HL0AUwjN0IJrjV5M71Auq66cqsT7gqr1JLawRkJGumHT65GRkxkwqY3BU/ MxGq9C38mXkZhwnAkd+MxpWMhDdtKXPWWweOfQ== )`
	RRSIG=61809 and DNSKEY=61809 verifies the DS RRset
	DS=35663/SHA-256 is now in the chain-of-trust
	`edu. 86400 IN DS ( 35663 13 2 a2e1614291831a4746b5ac52b4b345357687271e85353082741f1cf3d06a4c1d )`
	Query to f.edu-servers.net for edu/DNSKEY
	Received 291 bytes from 192.35.51.30
	;; Response received from [192.35.51.30] 291 octets ;; HEADER SECTION ;; id = 43006 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 3 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 4096, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; edu. IN DNSKEY ;; ANSWER SECTION (3 records) edu. 86400 IN DNSKEY ( 256 3 13 z4lwcWrgRUDpdraaCEucEEmkrer/JTr5FtHXCpe1b+wON9Q2f0ytrulcutPgQOuh8YhsdM+cJa1X 5pDSvxeySA== ) ; keytag 35999 edu. 86400 IN DNSKEY ( 257 3 13 vqk4cwmCpZkXat25PaOVt3RPYDOmCr8B4D1IynrqSqzs+BeCYI6pnBNRUD9BgfqbxZHyfyDz6vbv 8KQaT7maRw== ) ; keytag 35663 edu. 86400 IN RRSIG ( DNSKEY 13 1 86400 20251121161114 20251106160614 35663 edu. MQpyEG5JAED/KAVQGwp4hZm99HcUZm0CUtB7HERQNE8Hqg/BNsp6HZcJT91XpVm6jzsjumKGQxnL pN23vLYMEg== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 2 DNSKEY records for edu
	`edu. 86400 IN DNSKEY ( 256 3 13 z4lwcWrgRUDpdraaCEucEEmkrer/JTr5FtHXCpe1b+wON9Q2f0ytrulcutPgQOuh8YhsdM+cJa1X 5pDSvxeySA== ) ; keytag 35999`
	`edu. 86400 IN DNSKEY ( 257 3 13 vqk4cwmCpZkXat25PaOVt3RPYDOmCr8B4D1IynrqSqzs+BeCYI6pnBNRUD9BgfqbxZHyfyDz6vbv 8KQaT7maRw== ) ; keytag 35663`
	DNSKEY=35663/SEP is now in the chain-of-trust
	DS=35663/SHA-256 verifies DNSKEY=35663/SEP
	Found 1 RRSIGs over DNSKEY RRset
	`edu. 86400 IN RRSIG ( DNSKEY 13 1 86400 20251121161114 20251106160614 35663 edu. MQpyEG5JAED/KAVQGwp4hZm99HcUZm0CUtB7HERQNE8Hqg/BNsp6HZcJT91XpVm6jzsjumKGQxnL pN23vLYMEg== )`
	RRSIG=35663 and DNSKEY=35663/SEP verifies the DNSKEY RRset
	DNSKEY=35999 is now in the chain-of-trust
	Query to m.edu-servers.net for columbia.edu/A
	Received 559 bytes from 192.55.83.30
	;; Response received from [192.55.83.30] 559 octets ;; HEADER SECTION ;; id = 19161 ;; qr = 1 aa = 0 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 0 ;; nscount = 10 arcount = 2 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 4096, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (10 records) 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. 900 IN NSEC3 ( 1 1 0 - 9irjmuel398sejh8crdik2h2k85k5243 NS SOA RRSIG DNSKEY NSEC3PARAM ) 9DHS4EP5G85PF9NUFK06HEK0O48QGK77.edu. 900 IN RRSIG ( NSEC3 13 2 900 20251113030128 20251106015128 35999 edu. e3618JnHPzmndgNmAhv8Wj3MgOGCQCqJrJzJCk4q1V3lRq5E4qSlfq2Y1izxmZOSWT8FM09EWByr TTF/eOD4Pg== ) 81UV3SQLCB4SE03LD7PLE8UB7GH4EU8B.edu. 900 IN NSEC3 ( 1 1 0 - 84r3vll0i0qrhsi5n9sj2knksff0jnmp NS DS RRSIG ) 81UV3SQLCB4SE03LD7PLE8UB7GH4EU8B.edu. 900 IN RRSIG ( NSEC3 13 2 900 20251114030144 20251107015144 35999 edu. Jyr9Yej17PlrYM+uNQ3nz4+ClGdwf9LxW7/dTgH4Or1FdmNoXavv1ZHcY+dVYa8fmTF4jYEhTR1g umz7HP8oKA== ) ;; ADDITIONAL SECTION (2 records) ext-ns1.columbia.edu. 172800 IN A 128.59.1.1 ;; { "EDNS-VERSION": 0 }
	Query to a.edu-servers.net for columbia.edu/DNSKEY
	Received 559 bytes from 192.5.6.30
	;; Response received from [192.5.6.30] 559 octets ;; HEADER SECTION ;; id = 39204 ;; qr = 1 aa = 0 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 0 ;; nscount = 10 arcount = 2 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 4096, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; columbia.edu. IN DNSKEY ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (10 records) 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. 900 IN NSEC3 ( 1 1 0 - 9irjmuel398sejh8crdik2h2k85k5243 NS SOA RRSIG DNSKEY NSEC3PARAM ) 9DHS4EP5G85PF9NUFK06HEK0O48QGK77.edu. 900 IN RRSIG ( NSEC3 13 2 900 20251113030128 20251106015128 35999 edu. e3618JnHPzmndgNmAhv8Wj3MgOGCQCqJrJzJCk4q1V3lRq5E4qSlfq2Y1izxmZOSWT8FM09EWByr TTF/eOD4Pg== ) 81UV3SQLCB4SE03LD7PLE8UB7GH4EU8B.edu. 900 IN NSEC3 ( 1 1 0 - 84r3vll0i0qrhsi5n9sj2knksff0jnmp NS DS RRSIG ) 81UV3SQLCB4SE03LD7PLE8UB7GH4EU8B.edu. 900 IN RRSIG ( NSEC3 13 2 900 20251114030144 20251107015144 35999 edu. Jyr9Yej17PlrYM+uNQ3nz4+ClGdwf9LxW7/dTgH4Or1FdmNoXavv1ZHcY+dVYa8fmTF4jYEhTR1g umz7HP8oKA== ) ;; ADDITIONAL SECTION (2 records) ext-ns1.columbia.edu. 172800 IN A 128.59.1.1 ;; { "EDNS-VERSION": 0 }
	Found child zone columbia.edu

columbia.edu

	Checking DS between edu and columbia.edu
	Query to d.edu-servers.net for columbia.edu/DS
	Received 572 bytes from 192.31.80.30
	;; Response received from [192.31.80.30] 572 octets ;; HEADER SECTION ;; id = 551 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 0 ;; nscount = 6 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 4096, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; columbia.edu. IN DS ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (6 records) 9DHS4EP5G85PF9NUFK06HEK0O48QGK77.edu. 900 IN NSEC3 ( 1 1 0 - 9irjmuel398sejh8crdik2h2k85k5243 NS SOA RRSIG DNSKEY NSEC3PARAM ) 9DHS4EP5G85PF9NUFK06HEK0O48QGK77.edu. 900 IN RRSIG ( NSEC3 13 2 900 20251113030128 20251106015128 35999 edu. e3618JnHPzmndgNmAhv8Wj3MgOGCQCqJrJzJCk4q1V3lRq5E4qSlfq2Y1izxmZOSWT8FM09EWByr TTF/eOD4Pg== ) edu. 900 IN SOA ( a.edu-servers.net. nstld.verisign-grs.com. 1762734795 ;serial 1800 ;refresh 900 ;retry 604800 ;expire 900 ;minimum ) edu. 900 IN RRSIG ( SOA 13 1 900 20251117003315 20251109232315 35999 edu. 6eUUNVz8Jv/Y60NYYCEqxlzX46sl4KAJT6v8JVGXO5F7YG5CHD4P8lqv7ZomsHXtbs1PIvikQavh ld/gnTMbbA== ) 81UV3SQLCB4SE03LD7PLE8UB7GH4EU8B.edu. 900 IN NSEC3 ( 1 1 0 - 84r3vll0i0qrhsi5n9sj2knksff0jnmp NS DS RRSIG ) 81UV3SQLCB4SE03LD7PLE8UB7GH4EU8B.edu. 900 IN RRSIG ( NSEC3 13 2 900 20251114030144 20251107015144 35999 edu. Jyr9Yej17PlrYM+uNQ3nz4+ClGdwf9LxW7/dTgH4Or1FdmNoXavv1ZHcY+dVYa8fmTF4jYEhTR1g umz7HP8oKA== ) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	No DS records found for columbia.edu in the edu zone
	Query to auth5.dns.cogentco.com for columbia.edu/DNSKEY
	Received 96 bytes from 80.91.64.50
	;; Response received from [80.91.64.50] 96 octets ;; HEADER SECTION ;; id = 6420 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 0 ;; nscount = 1 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; 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. 90349 ;serial 3600 ;refresh 1800 ;retry 2419200 ;expire 300 ;minimum ) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	No DNSKEY records found
	Query to ns1.lse.ac.uk for columbia.edu/A
	Received 73 bytes from 158.143.96.8
	;; Response received from [158.143.96.8] 73 octets ;; HEADER SECTION ;; id = 61271 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 4000, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (2 records) columbia.edu. 3600 IN A 162.159.128.65 columbia.edu. 3600 IN A 162.159.138.64 ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	ns1.lse.ac.uk is authoritative for columbia.edu
	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 = 28084 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 0 co = 0 ;; qdcount = 1 ancount = 1 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "0000", ;; "RCODE": 0, ;; "UDPSIZE": 1220, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; columbia.edu. IN SOA ;; ANSWER SECTION (1 record) columbia.edu. 3600 IN SOA ( ext-ns1.columbia.edu. hostmaster.columbia.edu. 90349 ;serial 3600 ;refresh 1800 ;retry 2419200 ;expire 300 ;minimum ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Query to auth1.dns.cogentco.com for columbia.edu/SOA
	Received 305 bytes from 66.28.0.14
	;; Response received from [66.28.0.14] 305 octets ;; HEADER SECTION ;; id = 42091 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 1 ;; nscount = 6 arcount = 4 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; columbia.edu. IN SOA ;; ANSWER SECTION (1 record) columbia.edu. 3600 IN SOA ( ext-ns1.columbia.edu. hostmaster.columbia.edu. 90349 ;serial 3600 ;refresh 1800 ;retry 2419200 ;expire 300 ;minimum ) ;; AUTHORITY SECTION (6 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 auth4.dns.cogentco.com. columbia.edu. 3600 IN NS auth5.dns.cogentco.com. columbia.edu. 3600 IN NS auth1.dns.cogentco.com. ;; ADDITIONAL SECTION (4 records) 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 }
	Query to auth2.dns.cogentco.com for columbia.edu/SOA
	Received 305 bytes from 66.28.0.30
	;; Response received from [66.28.0.30] 305 octets ;; HEADER SECTION ;; id = 40459 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 1 ;; nscount = 6 arcount = 4 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; columbia.edu. IN SOA ;; ANSWER SECTION (1 record) columbia.edu. 3600 IN SOA ( ext-ns1.columbia.edu. hostmaster.columbia.edu. 90349 ;serial 3600 ;refresh 1800 ;retry 2419200 ;expire 300 ;minimum ) ;; AUTHORITY SECTION (6 records) columbia.edu. 3600 IN NS auth2.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 auth1.dns.cogentco.com. columbia.edu. 3600 IN NS auth5.dns.cogentco.com. columbia.edu. 3600 IN NS auth4.dns.cogentco.com. ;; ADDITIONAL SECTION (4 records) 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 }
	Query to auth5.dns.cogentco.com for columbia.edu/SOA
	Received 305 bytes from 80.91.64.50
	;; Response received from [80.91.64.50] 305 octets ;; HEADER SECTION ;; id = 51867 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 1 ;; nscount = 6 arcount = 4 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; columbia.edu. IN SOA ;; ANSWER SECTION (1 record) columbia.edu. 3600 IN SOA ( ext-ns1.columbia.edu. hostmaster.columbia.edu. 90349 ;serial 3600 ;refresh 1800 ;retry 2419200 ;expire 300 ;minimum ) ;; AUTHORITY SECTION (6 records) columbia.edu. 3600 IN NS ext-ns1.columbia.edu. columbia.edu. 3600 IN NS auth1.dns.cogentco.com. 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 auth5.dns.cogentco.com. ;; ADDITIONAL SECTION (4 records) 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 }
	Query to auth4.dns.cogentco.com for columbia.edu/SOA
	Received 305 bytes from 80.245.32.74
	;; Response received from [80.245.32.74] 305 octets ;; HEADER SECTION ;; id = 4384 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 1 ;; nscount = 6 arcount = 4 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; columbia.edu. IN SOA ;; ANSWER SECTION (1 record) columbia.edu. 3600 IN SOA ( ext-ns1.columbia.edu. hostmaster.columbia.edu. 90349 ;serial 3600 ;refresh 1800 ;retry 2419200 ;expire 300 ;minimum ) ;; AUTHORITY SECTION (6 records) columbia.edu. 3600 IN NS auth5.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. columbia.edu. 3600 IN NS auth1.dns.cogentco.com. columbia.edu. 3600 IN NS ext-ns1.columbia.edu. ;; ADDITIONAL SECTION (4 records) 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 }
	Query to ns1.lse.ac.uk for columbia.edu/A
	Timeout querying ns1.lse.ac.uk/158.143.96.8 for columbia.edu/A
	All Queries to ns1.lse.ac.uk for columbia.edu/A timed out or failed
	columbia.edu A RR has value 162.159.128.65
	columbia.edu A RR has value 162.159.138.64
	No RRSIGs found

columbia.edu

	Query to ext-ns1.columbia.edu for columbia.edu/A
	Received 73 bytes from 128.59.1.1
	;; Response received from [128.59.1.1] 73 octets ;; HEADER SECTION ;; id = 50989 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 0 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "0000", ;; "RCODE": 0, ;; "UDPSIZE": 1220, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (2 records) columbia.edu. 3600 IN A 162.159.128.65 columbia.edu. 3600 IN A 162.159.138.64 ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	ext-ns1.columbia.edu is authoritative for columbia.edu
	Query to ext-ns1.columbia.edu for columbia.edu/A
	Received 73 bytes from 128.59.1.1
	;; Response received from [128.59.1.1] 73 octets ;; HEADER SECTION ;; id = 50762 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 0 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "0000", ;; "RCODE": 0, ;; "UDPSIZE": 1220, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (2 records) columbia.edu. 3600 IN A 162.159.138.64 columbia.edu. 3600 IN A 162.159.128.65 ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	columbia.edu A RR has value 162.159.138.64
	columbia.edu A RR has value 162.159.128.65
	No RRSIGs found

columbia.edu

	Query to auth5.dns.cogentco.com for columbia.edu/A
	Received 290 bytes from 80.91.64.50
	;; Response received from [80.91.64.50] 290 octets ;; HEADER SECTION ;; id = 54307 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 6 arcount = 4 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (2 records) columbia.edu. 3600 IN A 162.159.128.65 columbia.edu. 3600 IN A 162.159.138.64 ;; AUTHORITY SECTION (6 records) columbia.edu. 3600 IN NS auth2.dns.cogentco.com. columbia.edu. 3600 IN NS auth1.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 auth5.dns.cogentco.com. columbia.edu. 3600 IN NS auth4.dns.cogentco.com. ;; ADDITIONAL SECTION (4 records) 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 }
	auth5.dns.cogentco.com is authoritative for columbia.edu
	Query to auth5.dns.cogentco.com for columbia.edu/A
	Received 290 bytes from 80.91.64.50
	;; Response received from [80.91.64.50] 290 octets ;; HEADER SECTION ;; id = 27253 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 6 arcount = 4 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (2 records) columbia.edu. 3600 IN A 162.159.138.64 columbia.edu. 3600 IN A 162.159.128.65 ;; AUTHORITY SECTION (6 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 auth4.dns.cogentco.com. columbia.edu. 3600 IN NS auth5.dns.cogentco.com. columbia.edu. 3600 IN NS auth1.dns.cogentco.com. ;; ADDITIONAL SECTION (4 records) 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 }
	columbia.edu A RR has value 162.159.138.64
	columbia.edu A RR has value 162.159.128.65
	No RRSIGs found

columbia.edu

	Query to auth4.dns.cogentco.com for columbia.edu/A
	Received 290 bytes from 80.245.32.74
	;; Response received from [80.245.32.74] 290 octets ;; HEADER SECTION ;; id = 35510 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 6 arcount = 4 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (2 records) columbia.edu. 3600 IN A 162.159.128.65 columbia.edu. 3600 IN A 162.159.138.64 ;; AUTHORITY SECTION (6 records) 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 auth4.dns.cogentco.com. columbia.edu. 3600 IN NS auth5.dns.cogentco.com. columbia.edu. 3600 IN NS ext-ns1.columbia.edu. ;; ADDITIONAL SECTION (4 records) 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 }
	auth4.dns.cogentco.com is authoritative for columbia.edu
	Query to auth4.dns.cogentco.com for columbia.edu/A
	Received 290 bytes from 80.245.32.74
	;; Response received from [80.245.32.74] 290 octets ;; HEADER SECTION ;; id = 3213 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 6 arcount = 4 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (2 records) columbia.edu. 3600 IN A 162.159.128.65 columbia.edu. 3600 IN A 162.159.138.64 ;; AUTHORITY SECTION (6 records) 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 auth5.dns.cogentco.com. columbia.edu. 3600 IN NS ext-ns1.columbia.edu. ;; ADDITIONAL SECTION (4 records) 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 }
	columbia.edu A RR has value 162.159.128.65
	columbia.edu A RR has value 162.159.138.64
	No RRSIGs found

columbia.edu

	Query to auth2.dns.cogentco.com for columbia.edu/A
	Received 290 bytes from 66.28.0.30
	;; Response received from [66.28.0.30] 290 octets ;; HEADER SECTION ;; id = 60325 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 6 arcount = 4 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (2 records) columbia.edu. 3600 IN A 162.159.138.64 columbia.edu. 3600 IN A 162.159.128.65 ;; AUTHORITY SECTION (6 records) columbia.edu. 3600 IN NS auth2.dns.cogentco.com. columbia.edu. 3600 IN NS auth5.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 auth1.dns.cogentco.com. columbia.edu. 3600 IN NS auth4.dns.cogentco.com. ;; ADDITIONAL SECTION (4 records) 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 }
	auth2.dns.cogentco.com is authoritative for columbia.edu
	Query to auth2.dns.cogentco.com for columbia.edu/A
	Received 290 bytes from 66.28.0.30
	;; Response received from [66.28.0.30] 290 octets ;; HEADER SECTION ;; id = 6937 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 6 arcount = 4 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (2 records) columbia.edu. 3600 IN A 162.159.138.64 columbia.edu. 3600 IN A 162.159.128.65 ;; AUTHORITY SECTION (6 records) 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. columbia.edu. 3600 IN NS ext-ns1.columbia.edu. columbia.edu. 3600 IN NS ns1.lse.ac.uk. columbia.edu. 3600 IN NS auth4.dns.cogentco.com. ;; ADDITIONAL SECTION (4 records) 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 }
	columbia.edu A RR has value 162.159.138.64
	columbia.edu A RR has value 162.159.128.65
	No RRSIGs found

columbia.edu

	Query to auth1.dns.cogentco.com for columbia.edu/A
	Received 290 bytes from 66.28.0.14
	;; Response received from [66.28.0.14] 290 octets ;; HEADER SECTION ;; id = 9146 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 6 arcount = 4 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (2 records) columbia.edu. 3600 IN A 162.159.138.64 columbia.edu. 3600 IN A 162.159.128.65 ;; AUTHORITY SECTION (6 records) 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 auth5.dns.cogentco.com. columbia.edu. 3600 IN NS ext-ns1.columbia.edu. columbia.edu. 3600 IN NS auth2.dns.cogentco.com. ;; ADDITIONAL SECTION (4 records) 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 }
	auth1.dns.cogentco.com is authoritative for columbia.edu
	Query to auth1.dns.cogentco.com for columbia.edu/A
	Received 290 bytes from 66.28.0.14
	;; Response received from [66.28.0.14] 290 octets ;; HEADER SECTION ;; id = 51981 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 6 arcount = 4 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; columbia.edu. IN A ;; ANSWER SECTION (2 records) columbia.edu. 3600 IN A 162.159.128.65 columbia.edu. 3600 IN A 162.159.138.64 ;; AUTHORITY SECTION (6 records) columbia.edu. 3600 IN NS auth2.dns.cogentco.com. columbia.edu. 3600 IN NS auth4.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 ns1.lse.ac.uk. columbia.edu. 3600 IN NS auth1.dns.cogentco.com. ;; ADDITIONAL SECTION (4 records) 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 }
	columbia.edu A RR has value 162.159.128.65
	columbia.edu A RR has value 162.159.138.64
	No RRSIGs found

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