Startname whois - "Savable" Bulk Whois

Universal whois - Whois information about country-code (two-letter) top-level domains

Internic.net - Whois Search
Whois-search.com - Domain name Whois

Tool url - whois lookup tool

Better whois

Verisign WhoIs - Authoritative source for information on .com and .net domains, including IDN's

IDN Pros - IDN Enabled whois
Onsamehost.com - All websites hosted on the same IP-address

 

Other tools and links for domainers >>