.IN.NET is a second level domain name psuedo-registry operated by CentralNic.
The whois server for CentralNic domain names is
In the case of psuedo-registries, IANA does not manage any data about these extensions because they are not assigned by ICANN. For the most part, you would already have had to known that CentralNic manages
.IN.NET or checked the DNS records for
_nicname._tcp.in.net, which is a loosely followed standard -- it will not always give you results.
So, in your case, you will use the
whois command as follows:
whois -h whois.centralnic.com example.in.net
If this was a normal extension (e.g.
.NET), then you can find out the whois server by querying IANA's whois server.
whois -h whois.iana.org com
remarks: Registration information: http://www.verisign-grs.com