registration

^*=Foreign registration permitted

A

.ac – Ascension Island *
.ad – Andorra
.ae – United Arab Emirates
.af – Afghanistan
.ag – Antigua and Barbuda *
.ai – Anguilla
.al – Albania
.am – Armenia *
.an – Netherlands Antilles
.ao – Angola
.aq – Antarctica
.ar – Argentina
.as – American Samoa *
.at – Austria *
.au – Australia
.aw – Aruba
.ax – Aland Islands
.az – Azerbaijan

A domain name registry, also called Network Information Centre (NIC), is part of the Domain Name System (DNS) of the Internet which converts domain names to IP addresses. It is an organisation that manages the registration of Domain names within the top-level domains for which it is responsible, controls the policies of domain name allocation, and technically operates its top-level domain.

Domain names are managed under a hierarchy headed by the Internet Assigned Numbers Authority (IANA), which manages the top of the DNS tree by administrating the data in the root nameservers.

IANA also operates the .int registry for intergovernmental organisations, the .arpa zone for protocol administration purposes, and other critical zones such as root-servers.net.

IANA delegates all other domain name authority to other domain name registries such as VeriSign.

A domain hack is an unconventional domain name that combines domain labels, especially the top-level domain (TLD), to spell out the full "name" or title of the domain, making a kind of pun.

For example the second-level domain (SLD) blo.gs makes use of the TLD .gs (South Georgia and the South Sandwich Islands) to spell "blogs". The third-level domains del.icio.us and cr.yp.to make use of the SLDs icio.us and yp.to from the TLDs .us (United States) and .to (Tonga) to spell "delicious" and "crypto" respectively.