What is the whois server for .ac?
By default, whois server for .ac TLD is whois.nic.ac. This can be used to fetch the .ac domain/website whois information. Extension .ac sponsoring organisation is Network Information Center (AC Domain Registry)
c/o Cable and Wireless (Ascension Island) and its registered on 19-12-1997.
Sponsoring Organisation Details
Network Information Center (AC Domain Registry).
c/o Cable and Wireless (Ascension Island).
South Atlantic Ocean.
Ascension Island.
United Kingdom.
Usage
whois -h <whois server> <domain name>
For example
whois -h whois.nic.ac hiox.ac