Domain extensions that start with the letter 'O'

Domain extensions start with:
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z non-latin

Top-level domain (TLD) refers to the last segment of a domain name, or the part that follows immediately after the "dot" symbol. For example, in the internet address: https://webrate.net, the “.net” portion is the TLD.

You will also see TLDs also known as domain name extensions, the terms can be used interchangeably.

# Domain extension Type TLD Manager
1

.OARC.UK

 country-code Nominet UK
2

.OBI

 generic OBI Group Holding SE & Co. KGaA
3

.OBR.UK

 country-code Nominet UK
4

.OBSERVER

 generic Dog Beach, LLC
5

.OD.UA

 country-code Hostmaster Ltd.
6

.OF.BY

 country-code Reliable Software, Ltd.
7

.OFF

 generic Not assigned
8

.OFFICE

 generic Microsoft Corporation
9

.OH.US

 country-code Registry Services, LLC
10

.OKINAWA

 generic BRregistry, Inc.
11

.OLAYAN

 generic Crescent Holding GmbH
12

.OLAYANGROUP

 generic Crescent Holding GmbH
13

.OLDNAVY

 generic The Gap, Inc.
14

.OLLO

 generic Dish DBS Corporation
15

.OM

 country-code Telecommunications Regulatory Authority (TRA)
16

.OMEGA

 generic The Swatch Group Ltd
17

.ON.CA

 country-code Canadian Internet Registration Authority (CIRA) Autorité Canadienne pour les enregistrements Internet (ACEI)
18

.ONE

 generic One.com A/S
19

.ONG

 generic Public Interest Registry
20

.ONL

 generic iRegistry GmbH
21

.ONLINE

 generic Radix FZC
22

.ONLINE.TH

 country-code Thai Network Information Center Foundation
23

.ONYOURSIDE

 generic Not assigned
24

.OOO

 generic INFIBEAM INCORPORATION LIMITED
25

.OPEN

 generic American Express Travel Related Services Company, Inc.
26

.OPENINGTIMESIN.UK

 country-code Nominet UK
27

.OPOLE.PL

 country-code Research and Academic Computer Network
28

.OR.AT

 country-code nic.at GmbH
29

.OR.ID

 country-code Perkumpulan Pengelola Nama Domain Internet Indonesia (PANDI)
30

.OR.JP

 country-code Japan Registry Services Co., Ltd.
31

.OR.KR

 country-code Korea Internet & Security Agency (KISA)
32

.OR.TH

 country-code Thai Network Information Center Foundation
33

.OR.TZ

 country-code Tanzania Communications Regulatory Authority
34

.OR.UG

 country-code Uganda Online Ltd.
35

.OR.US

 country-code Registry Services, LLC
36

.ORACLE

 generic Oracle Corporation
37

.ORANGE

 generic Orange Brand Services Limited
38

.ORG

 generic Public Interest Registry (PIR)
39

.ORG.AE

 country-code Telecommunications and Digital Government Regulatory Authority (TDRA)
40

.ORG.AF

 country-code Ministry of Communications and IT
41

.ORG.AL

 country-code Electronic and Postal Communications Authority - AKEP
42

.ORG.AR

 country-code Presidencia de la Nación – Secretaría Legal y Técnica
43

.ORG.AU

 country-code .au Domain Administration (auDA)
44

.ORG.AZ

 country-code IntraNS
45

.ORG.BD

 country-code Posts and Telecommunications Division
46

.ORG.BH

 country-code Telecommunications Regulatory Authority (TRA)
47

.ORG.BO

 country-code Agencia para el Desarrollo de la Información de la Sociedad en Bolivia
48

.ORG.BR

 country-code Comite Gestor da Internet no Brasil
49

.ORG.BS

 country-code University of The Bahamas
50

.ORG.BT

 country-code Ministry of Information and Communications
51

.ORG.BW

 country-code Botswana Communications Regulatory Authority (BOCRA)
52

.ORG.BZ

 country-code University of Belize
53

.ORG.CN

 country-code China Internet Network Information Center (CNNIC)
54

.ORG.CO

 country-code Ministry of Information and Communications Technologies (MinTIC)
55

.ORG.CY

 country-code University of Cyprus
56

.ORG.DO

 country-code Pontificia Universidad Catolica Madre y Maestra Recinto Santo Tomas de Aquino
57

.ORG.EG

 country-code Egyptian Universities Network (EUN) Supreme Council of Universities
58

.ORG.ES

 country-code Red.es
59

.ORG.ET

 country-code Ethio telecom
60

.ORG.GE

 country-code Caucasus Online LLC
61

.ORG.GG

 country-code Island Networks Ltd.
62

.ORG.GH

 country-code Network Computer Systems Limited
63

.ORG.GR

 country-code ICS-FORTH GR
64

.ORG.GY

 country-code University of Guyana
65

.ORG.HK

 country-code Hong Kong Internet Registration Corporation Ltd.
66

.ORG.HU

 country-code Council of Hungarian Internet Providers (CHIP)
67

.ORG.IL

 country-code The Israel Internet Association (RA)
68

.ORG.IM

 country-code Isle of Man Government
69

.ORG.IN

 country-code National Internet Exchange of India
70

.ORG.IR

 country-code Institute for Research in Fundamental Sciences
71

.ORG.JE

 country-code Island Networks (Jersey) Ltd.
72

.ORG.JM

 country-code University of West Indies
73

.ORG.JO

 country-code Ministry of Digital Economy and Entrepreneurship (MoDEE)
74

.ORG.KH

 country-code Telecommunication Regulator of Cambodia (TRC)
75

.ORG.KW

 country-code Communications and Information Technology Regulatory Authority
76

.ORG.KY

 country-code Utility Regulation and Competition Office (OfReg)
77

.ORG.KZ

 country-code Association of IT Companies of Kazakhstan
78

.ORG.LA

 country-code Lao National Internet Committee (LANIC), Ministry of Posts and Telecommunications
79

.ORG.LB

 country-code American University of Beirut Computing and Networking Services
80

.ORG.LC

 country-code University of Puerto Rico
81

.ORG.LS

 country-code Lesotho Network Information Centre Proprietary (LSNIC)
82

.ORG.LY

 country-code General Post and Telecommunication Company
83

.ORG.MA

 country-code Agence Nationale de Réglementation des Télécommunications (ANRT)
84

.ORG.MK

 country-code Macedonian Academic Research Network Skopje
85

.ORG.MO

 country-code Macao Post and Telecommunications Bureau (CTT)
86

.ORG.MT

 country-code NIC (Malta)
87

.ORG.MV

 country-code Dhiraagu Pvt. Ltd. (DHIVEHINET)
88

.ORG.MW

 country-code Malawi Sustainable Development Network Programme (Malawi SDNP)
89

.ORG.MX

 country-code NIC-Mexico ITESM - Campus Monterrey
90

.ORG.MY

 country-code MYNIC Berhad
91

.ORG.MZ

 country-code Centro de Informatica de Universidade Eduardo Mondlane
92

.ORG.NA

 country-code Namibian Network Information Center
93

.ORG.NG

 country-code Nigeria Internet Registration Association
94

.ORG.NI

 country-code Universidad Nacional del Ingernieria Centro de Computo
95

.ORG.NP

 country-code Mercantile Communications Pvt. Ltd.
96

.ORG.NZ

 country-code InternetNZ
97

.ORG.OM

 country-code Telecommunications Regulatory Authority (TRA)
98

.ORG.PA

 country-code Universidad Tecnologica de Panama
99

.ORG.PE

 country-code Red Cientifica Peruana
100

.ORG.PH

 country-code PH Domain Foundation
101

.ORG.PK

 country-code PKNIC
102

.ORG.PL

 country-code Research and Academic Computer Network
103

.ORG.PR

 country-code Gauss Research Laboratory Inc.
104

.ORG.PT

 country-code Associação DNS.PT
105

.ORG.PY

 country-code NIC-PY
106

.ORG.QA

 country-code Communications Regulatory Authority
107

.ORG.RO

 country-code National Institute for R&D in Informatics
108

.ORG.RS

 country-code Serbian National Internet Domain Registry (RNIDS)
109

.ORG.RU

 country-code Coordination Center for TLD RU
110

.ORG.RW

 country-code Rwanda Internet Community and Technology Alliance (RICTA) Ltd
111

.ORG.SA

 country-code Communications and Information Technology Commission
112

.ORG.SB

 country-code Solomon Telekom Company Limited
113

.ORG.SG

 country-code Singapore Network Information Centre (SGNIC) Pte Ltd
114

.ORG.SV

 country-code SVNet
115

.ORG.SZ

 country-code University of Swaziland Department of Computer Science
116

.ORG.TN

 country-code Agence Tunisienne d'Internet
117

.ORG.TR

 country-code Bilgi Teknolojileri ve İletişim Kurumu (BTK)
118

.ORG.TT

 country-code University of the West Indies Faculty of Engineering
119

.ORG.TW

 country-code Taiwan Network Information Center (TWNIC)
120

.ORG.UA

 country-code Hostmaster Ltd.
121

.ORG.UK

 country-code Nominet UK
122

.ORG.VE

 country-code Comisión Nacional de Telecomunicaciones (CONATEL)
123

.ORG.VN

 country-code Viet Nam Internet Network Information Center (VNNIC)
124

.ORG.ZM

 country-code Zambia Information and Communications Technology Authority (ZICTA)
125

.ORG.ZW

 country-code Postal and Telecommunications Regulatory Authority of Zimbabwe (POTRAZ)
126

.ORGANIC

 generic Afilias Limited
127

.ORIENTEXPRESS

 generic Retired
128

.ORIGINS

 generic The Estée Lauder Companies Inc.
129

.OS.UK

 country-code Nominet UK
130

.OSAKA

 generic Osaka Registry Co., Ltd.
131

.OSAKA.JP

 country-code Japan Registry Services Co., Ltd.
132

.OSTRODA.PL

 country-code Research and Academic Computer Network
133

.OTSUKA

 generic Otsuka Holdings Co., Ltd.
134

.OTT

 generic Dish DBS Corporation
135

.OVH

 generic OVH SAS
136

.OZ-DMR.UK

 country-code Nominet UK
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