getting DNS info with dig
I am a relative novice with linux, and so would appreciate any help from people on thie following issue .
I am trying to find out who are the DNS servers for a set of IP addresses. Usually when I do ">dig $ip" I can see the DIG options, question section, answer section blah blah...
In the Authority section, I think the root servers for the domain being probed are listed. The thing is is for nearly all the IPs I am looking up the Authority section always comes out to be the same, which bothers me..am I doing something wrong..
e.g. I look up dig 188.8.131.52 and I get,
; <<>> DiG 9.3.1 <<>> 184.108.40.206
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 58078
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;220.127.116.11. IN A
;; AUTHORITY SECTION:
. 10342 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2007040500 1800 900 604800 86400
;; Query time: 45 msec
;; SERVER: 18.104.22.168#53(22.214.171.124)
;; WHEN: Thu Apr 5 10:11:53 2007
;; MSG SIZE rcvd: 107
Can I now say that the authoritative DNS server for this ip is a.root-servers.net. nstld.verisign-grs.com ?
For the following set of IPs too I get the same output..which could be OK, but would slightly strange !
Any advice on this would be greatly appreciated.