WHOIS Lookup
Find out who owns that domain and when it expires.
Discovering Website Owners
The WHOIS protocol is a huge public phone book of the internet. Every time someone buys a domain (.com, .com.br), their registration data (Name, Company, Creation and Expiration Date) is recorded on official servers. Through this query, you can find out if that amazing domain has already been bought and when it will expire so you can try to buy it.