I use whois example.com
to check which are the authoritative name servers for that domain. Now I want to know which are the authoritative name servers for a block of IP addresses for their PTR records, how can I check that? Thanks.
How to check name servers for reverse DNS
domain-name-systemreverse-dns
Best Answer
Puting information into whois depends on owner of block address - it's not obligatory. If owner put it, you can ask for example as
If you want to ask for authoritative nameserver, better ask ns-es for it desceding for every octet, for example:
Another option is using dnstracetool. for example:
You can also use dig to trace dnsservers, for example: