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Accepted
CarpeNoctem
Asked: 2010-11-29 22:32:18 +0800 CST

Discover server responsible for serving a PTR for a specific IP?

  • 772

Just as the title reads: How do I discover what nameserver is the authoritative nameserver for PTR records for a specific IP?

nameserver dig ptr-record

5 Answers

  1. Best Answer

    Or another way using nslookup on an address in the 216.239.32.0 subnet:

    set type=ns
32.239.216.in-addr.arpa

    Which will give you a list of name-servers for that reverse-lookup domain.

    • 5

  2. Sorry it's kind of obvious, it's late give me a break.

    dig XX.XX.XX.in-addr.arpa. will reply with the SOA if one has been assigned.

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  3. Let's consider the IP 198.1.1.1 here are the different dig commands to use to get the authoritative server (SOA) for different blocks of including this IP:

    $ dig +short soa -x 198.1.1.1
$

    means there is no SOA a this level (/32),

    $ dig +short soa -x 198.1.1
smtdns1. hostmaster. 8 900 600 86400 3600
$

    means smtdns1 is the SOA a this level (/24),

    $ dig +short soa -x 198
z.arin.net. dns-ops.arin.net. 2017029249 1800 900 691200 10800
$

    means z.arin.net i sthe SOA a this level (/8).

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  4. IF you are using Linux, try 'dig -x '.

    • -1

  5. DNSStuff.com is a great place - their free tool will show this - as well as some other information for who is responsible for the IP Space - in case you need abuse contact details.

    Don't worry - we all know how those late nights go...

    • -1