Domain Name Extension Definitions
This page contains a list of more than 300 domain name extensions and their definitions.
Domain name extensions always consist of the top-level domain, and sometimes a second-level domain.
The top-level domains in this list are recognized by 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.
Generic Top-Level Domains (gTLD)
The following table represents the generic top-level domains (i.e. including .com, .org, etc).
| Domain | Purpose / Sponsoring Organization |
|---|---|
| .COM | Generic
top-level domain VeriSign Global Registry Services |
| .INFO | Generic top-level domain Afilias Limited |
| .NET | Generic top-level domain VeriSign Global Registry Services |
| .ORG | Generic top-level domain Public Interest Registry (PIR) |
Generic-Restricted Top-Level Domains
Generic-restricted top-level domain names are similar to the generic top-level domains, only eligibility is intended to be restricted and ascertained more stringently.
| Domain | Purpose / Sponsoring Organization |
|---|---|
| .BIZ | Restricted for Business NeuStar, Inc. |
| .NAME | Reserved for individuals The Global Name Registry Ltd. |
| .PRO | Restricted to credentialed professionals and related entities |
Sponsored Top-Level Domains (sTLD)
These domains are proposed and sponsored by private agencies or organizations that establish and enforce rules restricting the eligibility to use the TLD. IANA also groups sTLDs with the generic top-level domains.
| Domain | Purpose / Sponsoring Organization |
|---|---|
| .AERO | Reserved for members of the air-transport industry |
| .ASIA | Restricted to the Pan-Asia and Asia Pacific community DotAsia Organization Ltd. |
| .CAT | Reserved for the Catalan linguistic and cultural community Fundacio puntCAT |
| .COOP | Reserved for cooperative associations DotCooperation LLC |
| .EDU | Reserved for post-secondary institutions accredited by an agency on the U.S. Department of Education's list of Nationally Recognized Accrediting Agencies EDUCAUSE |
| .GOV | Reserved exclusively for the United States Government |
| .INT | Used only for registering organizations established by international treaties between governments Internet Assigned Numbers Authority |
| .JOBS | Reserved for human resource managers Employ Media LLC |
| .MIL | Reserved exclusively for the United States Military DoD Network Information Center |
| .MOBI | Reserved for consumers and providers of mobile products and services mTLD Top Level Domain Limited dba dotMobi |
| .MUSEUM | Reserved for museums Museum Domain Management Association |
| .TEL | Reserved for businesses and individuals to publish their contact data Telnic Ltd. |
| .TRAVEL | Reserved for entities whose primary area of activity is in the travel industry Tralliance Registry Management Company, LLC. |
Country Code Top-Level Domains (ccTLD)
Country code top-level domain names are those that are generally used for a specific country or dependent territory. All ccTLD identifiers are two letters long, and all two-letter top-level domains are ccTLDs.
Some countries use a second-level domain to represent the entity type (for example, .com.cn for Chinese companies, or .org.cn for Chinese organizations).
| Domain | Purpose / Sponsoring Organization |
|---|---|
| A | |
| .AC | Ascension Island |
| .AD | Andorra STA Servei de Telecomunicacions d'Andorra |
| .AE | United Arab Emirates Telecommunication Regulatory Authority (TRA) |
| .AF | Afghanistan Ministry of Communications and IT |
| .AG | Antigua and Barbuda UHSA School of Medicine |
| .AI | Anguilla Government of Anguilla |
| .AL | Albania Electronic and Postal Communications Authority - AKEP |
| .AM | Armenia Internet Society |
| .AN | Netherlands Antilles University of The Netherlands Antilles |
| .AO | Angola Faculdade de Engenharia da Universidade Agostinho Neto |
| .AQ | Antarctica Mott and Associates |
| .AR | Argentina |
| .AS | American
Samoa AS Domain Registry |
| .AT | Austria NIC.AT Internet Verwaltungs und Betriebsgesellschaft m.b.H |
| .AU | Australia .au Domain Administration (auDA) |
| .AW | Aruba SETAR |
| .AX | Aland Islands Ålands landskapsregering |
| .AZ | Azerbaijan IntraNS |
| B | |
| .BA | Bosnia
and Herzegovina Universtiy Telinformatic Centre (UTIC) |
| .BB | Barbados |
| .BD | Bangladesh |
| .BE | Belgium DNS BE vzw/asbl |
| .BF | Burkina
Faso DELGI Delegational Generale Informatique |
| .BG | Bulgaria Register.BG |
| .BH | Bahrain BATELCO |
| .BI | Burundi Centre National de l'Informatique |
| .BJ | Benin Offices des Postes et Telecommunications |
| .BL | Saint
Barthelemy Not assigned |
| .BM | Bermuda |
| .BN | Brunei
Darussalam Jabatan Telekom Brunei |
| .BO | Bolivia Agencia para el Desarrollo de la Información de la Sociedad en Bolivia |
| .BR | Brazil Comite Gestor da Internet no Brasil |
| .BS | Bahamas The College of the Bahamas |
| .BT | Bhutan Ministry of Information and Communications |
| .BV | Bouvet
Island UNINETT Norid A/S |
| .BW | Botswana University of Botswana |
| .BY | Belarus The State Centre of Security Information of Belarus Republic |
| .BZ | Belize University College of Belize |
| C | |
| .CA | Canada |
| .CC | Cocos
(Keeling) Islands |
| .CD | Congo,
The Democratic Republic of the NIC Congo - Interpoint SARL |
| .CF | Central
African Republic Societe Centrafricaine de Telecommunications (SOCATEL) |
| .CG | Congo ONPT Congo and Interpoint Switzerland |
| .CH | Switzerland SWITCH The Swiss Education & Research Network |
| .CI | Cote
d'Ivoire INP-HB Institut National Polytechnique Felix Houphouet Boigny |
| .CK | Cook
Islands Telecom Cook Islands Ltd. |
| .CL | Chile NIC Chile (University of Chile) |
| .CM | Cameroon Cameroon Telecommunications (CAMTEL) |
| .CN | China |
| .CO | Colombia |
| .CR | Costa
Rica |
| .CU | Cuba |
| .CV | Cape
Verde Instituto Superior de Engenharia e Ciencias do Mar |
| .CX | Christmas
Island Christmas Island Internet Administration Limited |
| .CY | Cyprus University of Cyprus |
| .CZ | Czech
Republic CZ.NIC, z.s.p.o |
| D | |
| .DE | Germany DENIC eG |
| .DJ | Djibouti Societe des Telecommunications Internationales de Djibouti (STID) |
| .DK | Denmark Dansk Internet Forum |
| .DM | Dominica DotDM Corporation |
| .DO | Dominican
Republic |
| .DZ | Algeria CERIST |
| E | |
| .EC | Ecuador NIC.EC (NICEC) S.A. |
| .EE | Estonia National Institute of Chemical Physics and Biophysics |
| .EG | Egypt |
| .EH | Western
Sahara Not assigned |
| .ER | Eritrea Eritrea Telcommunication Services Corporation (EriTel) |
| .ES | Spain Red.es |
| .ET | Ethiopia Ethiopian Telecommunications Corporation |
| .EU | European
Union EURid vzw/asbl |
| F | |
| .FI | Finland Finnish Communications Regulatory Authority |
| .FJ | Fiji |
| .FK | Falkland
Islands (Malvinas) Falkland Islands Government |
| .FM | Micronesia,
Federated States of FSM Telecommunications Corporation |
| .FO | Faroe
Islands FO Council |
| .FR | France AFNIC (NIC France) - Immeuble International |
| G | |
| .GA | Gabon Gabon Telecom |
| .GB | United
Kingdom Reserved Domain - IANA |
| .GD | Grenada The National Telecommunications Regulatory Commission (NTRC) |
| .GE | Georgia SANET Ltd. |
| .GF | French
Guiana Net Plus |
| .GG | Guernsey Island Networks Ltd. |
| .GH | Ghana Network Computer Systems Limited |
| .GI | Gibraltar Sapphire Networks |
| .GL | Greenland TELE Greenland A/S |
| .GM | Gambia GM-NIC |
| .GN | Guinea Centre National des Sciences Halieutiques de Boussoura |
| .GP | Guadeloupe Networking Technologies Group |
| .GQ | Equatorial
Guinea GETESA |
| .GR | Greece ICS-FORTH GR |
| .GS | South
Georgia and the South Sandwich Islands Government of South Georgia and South Sandwich Islands (GSGSSI) |
| .GT | Guatemala Universidad del Valle de Guatemala |
| .GU | Guam |
| .GW | Guinea-Bissau Fundação IT & MEDIA Universidade de Bissao |
| .GY | Guyana University of Guyana |
| H | |
| .HK | Hong
Kong Hong Kong Internet Registration Corporation Ltd. |
| .HM | Heard
Island and McDonald Islands HM Domain Registry |
| .HN | Honduras Red de Desarrollo Sostenible Honduras |
| .HR | Croatia CARNet - Croatian Academic and Research Network |
| .HT | Haiti Consortium FDS/RDDH |
| .HU | Hungary Council of Hungarian Internet Providers (CHIP) |
| I | |
| .ID | Indonesia IDNIC-PPAU Mikroelektronika |
| .IE | Ireland |
| .IL | Israel Internet Society of Israel |
| .IM | Isle
of Man Isle of Man Government |
| .IN | India National Centre for Software Technology |
| .IO | British
Indian Ocean Territory |
| .IQ | Iraq |
| .IR | Iran,
Islamic Republic of Institute for Studies in Theoretical Physics & Mathematics (IPM) |
| .IS | Iceland ISNIC - Internet Iceland ltd. |
| .IT | Italy IIT - CNR |
| J | |
| .JE | Jersey Island Networks (Jersey) Ltd. |
| .JM | Jamaica University of West Indies |
| .JO | Jordan National Information Technology Centre |
| .JP | Japan Japan Registry Services Co., Ltd. |
| K | |
| .KE | Kenya Kenya Network Information Center (KeNIC) |
| .KG | Kyrgyzstan AsiaInfo Telecommunication Enterprise |
| .KH | Cambodia Ministry of Post and Telecommunications |
| .KI | Kiribati Ministry of Communications, Transport, and Tourism Development |
| .KM | Comoros Comores Telecom |
| .KN | Saint
Kitts and Nevis Ministry of Finance, Sustainable Development Information & Technology |
| .KP | Korea,
Democratic People's Republic of Korea Computer Center |
| .KR | Korea,
Republic of National Internet Development Agency of Korea (NIDA) |
| .KW | Kuwait Ministry of Communications |
| .KY | Cayman
Islands The Information and Communications Technology Authority |
| .KZ | Kazakhstan Association of IT Companies of Kazakhstan |
| L | |
| .LA | Lao
People's Democratic Republic |
| .LB | Lebanon |
| .LC | Saint
Lucia University of Puerto Rico |
| .LI | Liechtenstein Hochschule Liechtenstein |
| .LK | Sri
Lanka |
| .LR | Liberia Data Technology Solutions, Inc. |
| .LS | Lesotho National University of Lesotho |
| .LT | Lithuania |
| .LU | Luxembourg RESTENA |
| .LV | Latvia |
| .LY | Libyan
Arab Jamahiriya General Post and Telecommunication Company |
| M | |
| .MA | Morocco Agence Nationale de Réglementation des Télécommunications (ANRT) |
| .MC | Monaco |
| .MD | Moldova MoldData S.E. |
| .ME | Montenegro Government of Montenegro |
| .MF | Saint
Martin Not assigned |
| .MG | Madagascar NIC-MG (Network Information Center Madagascar) |
| .MH | Marshall
Islands Cabinet Office |
| .MK | Macedonia,
The Former Yugoslav Republic of Ministry of Foreign Relations |
| .ML | Mali SOTELMA |
| .MM | Myanmar Ministry of Communications, Posts & Telegraphs |
| .MN | Mongolia Datacom Co., Ltd. |
| .MO | Macao University of Macau |
| .MP | Northern
Mariana Islands Saipan Datacom, Inc. |
| .MQ | Martinique SYSTEL |
| .MR | Mauritania University of Nouakchott |
| .MS | Montserrat MNI Networks Ltd. |
| .MT | Malta NIC (Malta) |
| .MU | Mauritius Internet Direct Ltd |
| .MV | Maldives Dhiraagu Pvt. Ltd. (DHIVEHINET) |
| .MW | Malawi |
| .MX | Mexico |
| .MY | Malaysia MYNIC Berhad |
| .MZ | Mozambique Centro de Informatica de Universidade Eduardo Mondlane |
| N | |
| .NA | Namibia Namibian Network Information Center |
| .NC | New
Caledonia Office des Postes et Telecommunications |
| .NE | Niger SONITEL |
| .NF | Norfolk
Island Norfolk Island Data Services |
| .NG | Nigeria |
| .NI | Nicaragua |
| .NL | Netherlands Stichting Internet Domeinregistratie Nederland |
| .NO | Norway UNINETT Norid A/S |
| .NP | Nepal Mercantile Communications Pvt. Ltd. |
| .NR | Nauru CENPAC NET |
| .NU | Niue Internet Users Society - Niue |
| .NZ | New
Zealand InternetNZ |
| O | |
| .OM | Oman Oman Telecommunications Company |
| P | |
| .PA | Panama |
| .PE | Peru Red Cientifica Peruana |
| .PF | French
Polynesia |
| .PG | Papua
New Guinea |
| .PH | Philippines PH Domain Foundation |
| .PK | Pakistan PKNIC |
| .PL | Poland Research and Academic Computer Network |
| .PM | Saint
Pierre and Miquelon AFNIC (NIC France) - Immeuble International |
| .PN | Pitcairn Pitcairn Island Administration |
| .PR | Puerto
Rico Gauss Research Laboratory Inc. |
| .PS | Palestinian
Territory, Occupied |
| .PT | Portugal Fundacao para a Computacao Cientifica Nacional |
| .PW | Palau Micronesia Investment and Development Corporation |
| .PY | Paraguay NIC-PY |
| Q | |
| .QA | Qatar Qatar Telecom (Q-Tel) Q.S.C. |
| R | |
| .RE | Reunion AFNIC (NIC France) - Immeuble International |
| .RO | Romania National Institute for R&D in Informatics |
| .RS | Serbia |
| .RU | Russian
Federation Coordination Center for TLD RU |
| .RW | Rwanda NIC Congo - Interpoint SARL |
| S | |
| .SA | Saudi
Arabia Communications and Information Technology Commission |
| .SB | Solomon
Islands Solomon Telekom Company Limited |
| .SC | Seychelles VCS Pty Ltd |
| .SD | Sudan Sudan Internet Society |
| .SE | Sweden The Internet Infrastructure Foundation |
| .SG | Singapore Singapore Network Information Centre (SGNIC) Pte Ltd |
| .SH | Saint
Helena Government of St. Helena |
| .SI | Slovenia Academic and Research Network of Slovenia (ARNES) |
| .SJ | Svalbard
and Jan Mayen UNINETT Norid A/S |
| .SK | Slovakia SK-NIC, a.s. |
| .SL | Sierra
Leone Sierratel |
| .SM | San
Marino Telecom Italia San Marino S.p.A. |
| .SN | Senegal |
| .SO | Somalia |
| .SR | Suriname Telesur |
| .ST | Sao
Tome and Principe Tecnisys |
| .SU | Soviet
Union (being phased out) |
| .SV | El Salvador |
| .SY | Syrian Arab Republic Syrian Telecommunications Establishment (STE) |
| .SZ | Swaziland |
| T | |
| .TC | Turks
and Caicos Islands Melrex TC |
| .TD | Chad Société des télécommunications du Tchad (SOTEL TCHAD) |
| .TF | French
Southern Territories AFNIC (NIC France) - Immeuble International |
| .TG | Togo CAFE INFORMATIQUE ET TELECOMMUNICATION |
| .TH | Thailand Thai Network Information Center Foundation |
| .TJ | Tajikistan Information Technology Center |
| .TK | Tokelau Telecommunication Tokelau Corporation (Teletok) |
| .TL | Timor-Leste |
| .TM | Turkmenistan TM Domain Registry Ltd |
| .TN | Tunisia Agence Tunisienne d'Internet |
| .TO | Tonga |
| .TP | Portuguese
Timor (being phased out) - |
| .TR | Turkey |
| .TT | Trinidad
and Tobago |
| .TV | Tuvalu Ministry of Finance and Tourism |
| .TW | Taiwan Taiwan Network Information Center (TWNIC) |
| .TZ | Tanzania,
United Republic of University of Dar Es Salaam |
| U | |
| .UA | Ukraine Communication Systems Ltd |
| .UG | Uganda Uganda Online Ltd. |
| .UK | United
Kingdom Nominet UK |
| .UM | United
States Minor Outlying Islands Not assigned |
| .US | United
States |
| .UY | Uruguay SeCIU - Universidad de la Republica |
| .UZ | Uzbekistan |
| V | |
| .VA | Holy
See (Vatican City State) |
| .VC | Saint
Vincent and the Grenadines Ministry of Telecommunications, Science, Technology and Industry |
| .VE | Venezuela Centro Nacional de Tecnologias de Informacion |
| .VG | Virgin
Islands, British Pinebrook Developments Ltd |
| .VI | Virgin
Islands, U.S. |
| .VN | Viet
Nam Ministry of Post and Telematics |
| .VU | Vanuatu Telecom Vanuatu Limited |
| W | |
| .WF | Wallis
and Futuna AFNIC (NIC France) - Immeuble International |
| .WS | Samoa |
| Y | |
| .YE | Yemen TeleYemen |
| .YT | Mayotte AFNIC (NIC France) - Immeuble International |
| .YU | Yugoslavia
(being phased out) Serbian National Register of Internet Domain Names (temporary caretaker) |
| Z | |
| .ZA | South
Africa ZA Domain Name Authority |
| .ZM | Zambia ZAMNET Communication Systems Ltd. |
| .ZW | Zimbabwe Postal and Telecommunications Regulatory Authority of Zimbabwe (POTRAZ) |
Reserved Top-Level Domains
The following top-level domains are reserved by the Internet Assigned Numbers Authority (IANA).
Note that some of the internationalized domains may not display correctly. This will depend on the character sets supported by your computer.
| Domain | Purpose / Sponsoring Organization |
|---|---|
| .TEST | For use in testing of current or new DNS related code Internet Assigned Numbers Authority |
| .EXAMPLE | For use in documentation or as examples Internet Assigned Numbers Authority |
| .INVALID | Intended for use in online construction of domain names that are sure to be invalid and which it is obvious at a glance are invalid Internet Assigned Numbers Authority |
| .LOCALHOST | Reserved to avoid conflict with the traditional use of localhost. Localhost has traditionally been statically defined in host DNS implementations as having an A record pointing to the loop back IP address and is reserved for such use. Any other use would conflict with widely deployed code which assumes this use. Internet Assigned Numbers Authority |
| .TEST | Recommended for use in testing of current or new DNS related code Internet Assigned Numbers Authority |
| .ARPA | Reserved exclusively to support operationally-critical infrastructural identifier spaces as advised by the Internet Architecture Board Internet Assigned Numbers Authority |
| .INT | Used only for registering organizations established by international treaties between governments Internet Assigned Numbers Authority |
| .测试 test:zh-Hans |
Reserved
for testing internationalized domain names Internet Assigned Numbers Authority |
| .परीक्षा test:hi-Deva |
Reserved
for testing internationalized domain names Internet Assigned Numbers Authority |
| .испытание test:ru-Cyrl |
Reserved
for testing internationalized domain names Internet Assigned Numbers Authority |
| .테스트 test:ko-Hang |
Reserved
for testing internationalized domain names Internet Assigned Numbers Authority |
| .טעסט test:yi-Hebr |
Reserved
for testing internationalized domain names Internet Assigned Numbers Authority |
| .測試 test:zh-Hant |
Reserved
for testing internationalized domain names Internet Assigned Numbers Authority |
| .آزمایشی test:fa-Arab |
Reserved
for testing internationalized domain names Internet Assigned Numbers Authority |
| .பரிட்சை test:ta-Taml |
Reserved
for testing internationalized domain names Internet Assigned Numbers Authority |
| .δοκιμή test:el-Grek |
Reserved
for testing internationalized domain names Internet Assigned Numbers Authority |
| .إختبار test:ar-Arab |
Reserved
for testing internationalized domain names Internet Assigned Numbers Authority |
| .テスト test:ja-Kana |
Reserved
for testing internationalized domain names Internet Assigned Numbers Authority |
Registering Domain Names
You can register top-level domain names via ZappyHost.