http://www.kloth.net/services/whois.php

Query this WHOIS service to look up internet domain name information. This online web tool works for generic top level (gTLD) domains .COM/.NET/.ORG/.BIZ/.INFO and many (most) other national ccTLD (country code TLDs) domain names by sending a realtime query to specific domain registry whois servers.

Just enter SLD.TLD (top level and second level domains), no "WWW" or other sub-domain data (example: enter example.com, not www.example.com).