WHOIS -More About Domain And IP

The WHOIS database is a worldwide database maintained by various domain registration companies across the globe containing listings of the domain registered at their company or country. The WHOIS query searches the database to gather critical information on both domain and the IP address.

Ok,  now we can try do a WHOIS Query by clicking here!!
We can do a query even using the IP address.

Querying individual Regional Internet Registries directly

WHOIS servers operated by Regional Internet Registries (RIR) can be queried directly to determine the Internet Service Provider responsible for a particular resource. For web-based searches, these server URLs are:

• ARIN 
• RIPE NCC 
• APNIC
• LACNIC
• AfriNIC

The records of each of these registries are cross-referenced, so that a query to ARIN for a record which belongs to RIPE will return a placeholder pointing to the RIPE WHOIS server. This lets the WHOIS user making the query know that the detailed information resides on the RIPE server


Many tools also help us to do the WHOIS query. search the internet to find out such tools