Re:Use brute force to find an available domain name for Web ...
by rubyrescue on Monday August 16, 2010 @07:00AM
(#1607396)
bustaname just uses a DNS lookup for an A record at the root of the domain. they say it's not 100% reliable but it's much faster than whois and i guess they don't want to use the zone file.
They frown on using it for domain lookups, but you might be able to get access anyway.