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Its a basic question question (a lil confused), does the authority section specify the DNS zone ?

dig -x 74.125.225.33
; <<>> DiG 9.7.3 <<>> -x 74.125.225.33
;; global options: +cmd
;; Got answer:
;;->>HEADER<<- opcode: QUERY, status: NOERROR, id: 63716
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 4, ADDITIONAL: 4
;; QUESTION SECTION:
;33.225.125.74.in-addr.arpa.    IN  PTR

;; ANSWER SECTION:
33.225.125.74.in-addr.arpa. 51707 IN    PTR ord08s06-in-f1.1e100.net.

;; AUTHORITY SECTION:
125.74.in-addr.arpa.    56447   IN  NS  NS3.GOOGLE.COM.
125.74.in-addr.arpa.    56447   IN  NS  NS2.GOOGLE.COM.
125.74.in-addr.arpa.    56447   IN  NS  NS4.GOOGLE.COM.
125.74.in-addr.arpa.    56447   IN  NS  NS1.GOOGLE.COM.

;; ADDITIONAL SECTION:
NS1.GOOGLE.COM.     213489  IN  A   216.239.32.10
NS2.GOOGLE.COM.     213489  IN  A   216.239.34.10
NS3.GOOGLE.COM.     213489  IN  A   216.239.36.10
NS4.GOOGLE.COM.     213489  IN  A   216.239.38.10
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3  
What do you mean by 'determine the DNS zone'? –  Zoredache May 31 '13 at 0:18
    
What exactly is a DNS zone ? –  ks_1010 May 31 '13 at 20:22

2 Answers 2

The authority section tells us what DNS servers can provide an authoritative answer to our query.

In your example, google.com has 4 authoritative nameservers. Authoritative nameservers are those configured to answer DNS queries directly for a specific domain as opposed to simply caching DNS lookups from other servers.

When you register a domain, you list your authoritative nameservers so that systems know which nameservers to trust.

See: http://www.madboa.com/geek/dig/

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Fast answer is no. dig will just tell who controls that address.

whois will give you the publicly available IP address allocation data. However, the network block may have been split into smaller zones which are not publicly announce.

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