What can I find with a WHOIS lookup?

This tool gives you the ability to search for domain name registration info from WHOIS database.

Enter a domain name you are querying for Whois data (e.g. google.com)

What other say

Note: API Spot strives to make the domain name availability search process reliable; however, API Spot does not guarantee the availability of domain names or the accuracy or security of the WHOIS system. There are several factors that may cause the API Spot query to show incorrectly the availability of the currently registered domain. Irrespective of whether a domain name is already licensed, API Spot would not be able to register the domain or obtain the registration from the current registrar without the permission of the current owner. The registration process will not be completed until the domain name you requested has been registered with the proper registry in your name. API Spot is not liable if the domain names you have requested are already registered with third parties. The registration of the domain name via the API Spot is not complete until you receive the final confirmation e-mail from the API Spot. All API Spot registrations are subject to the Terms and Conditions of the API Spot.