Domainname Lookup Tool (whois)

Domain Lookup
Top Level Domains
Hints

Domain Name Lookup

Domainname or URL

Whois Server:

This online tool allows to lookup the holder and contact information of a given IP-address. It returns the registered IP address block together with information of the holder and contact information. IP addresses are administered and registered by different Network Coordination Centres (NCC), depending on the global region of the applicant.

Top Level Domains

Management of most top-level domains is delegated to responsible organizations by the Internet Corporation for Assigned Names and Numbers (ICANN), which operates the Internet Assigned Numbers Authority (IANA) and is in charge of maintaining the DNS root zone.

IANA today distinguishes the following groups of top-level domains:

Country-code top-level domains (ccTLD):
Two letter domains established for countries or territories or their internationalized domain names (IDN ccTLD). With some historical exceptions, the code for any territory is the same as its two-letter ISO 3166 code.
Generic top-level domains (gTLD):
Top-level domains with three or more characters. Unsponsored top-level domains operate directly under policies established by ICANN processes for the global Internet community. Sponsored top-level domains (sTLD) on the other hand are proposed and sponsored by private organizations that establish and enforce rules restricting the eligibility to use the TLD. Use is based on community theme concepts.
Infrastructure top-level domain:
This group consists of one domain, the Address and Routing Parameter Area (ARPA). It is managed by IANA on behalf of the Internet Engineering Task Force IETF for various purposes specified in Request for Comments RFCs.

Root Zone Database

http://www.iana.org/domains/root/db