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

.OLIGHTSTORE.UK

 country-code Nominet UK
15

.OLLO

 generic Dish DBS Corporation
16

.OM

 country-code Telecommunications Regulatory Authority (TRA)
17

.OMEGA

 generic The Swatch Group Ltd
18

.ON.CA

 country-code Canadian Internet Registration Authority (CIRA) Autorité Canadienne pour les enregistrements Internet (ACEI)
19

.ONE

 generic One.com A/S
20

.ONG

 generic Public Interest Registry
21

.ONL

 generic iRegistry GmbH
22

.ONLINE

 generic Radix FZC
23

.ONLINE.TH

 country-code Thai Network Information Center Foundation
24

.ONYOURSIDE

 generic Not assigned
25

.OOO

 generic INFIBEAM INCORPORATION LIMITED
26

.OPEN

 generic American Express Travel Related Services Company, Inc.
27

.OPENINGTIMESIN.UK

 country-code Nominet UK
28

.OPOLE.PL

 country-code Research and Academic Computer Network
29

.OR.AT

 country-code nic.at GmbH
30

.OR.ID

 country-code Perkumpulan Pengelola Nama Domain Internet Indonesia (PANDI)
31

.OR.JP

 country-code Japan Registry Services Co., Ltd.
32

.OR.KR

 country-code Korea Internet & Security Agency (KISA)
33

.OR.TH

 country-code Thai Network Information Center Foundation
34

.OR.TZ

 country-code Tanzania Communications Regulatory Authority
35

.OR.UG

 country-code Uganda Online Ltd.
36

.OR.US

 country-code Registry Services, LLC
37

.ORACLE

 generic Oracle Corporation
38

.ORANGE

 generic Orange Brand Services Limited
39

.ORG

 generic Public Interest Registry (PIR)
40

.ORG.AE

 country-code Telecommunications and Digital Government Regulatory Authority (TDRA)
41

.ORG.AF

 country-code Ministry of Communications and IT
42

.ORG.AL

 country-code Electronic and Postal Communications Authority - AKEP
43

.ORG.AR

 country-code Presidencia de la Nación – Secretaría Legal y Técnica
44

.ORG.AU

 country-code .au Domain Administration (auDA)
45

.ORG.AZ

 country-code IntraNS
46

.ORG.BD

 country-code Posts and Telecommunications Division
47

.ORG.BH

 country-code Telecommunications Regulatory Authority (TRA)
48

.ORG.BO

 country-code Agencia para el Desarrollo de la Información de la Sociedad en Bolivia
49

.ORG.BR

 country-code Comite Gestor da Internet no Brasil
50

.ORG.BS

 country-code University of The Bahamas
51

.ORG.BT

 country-code Ministry of Information and Communications
52

.ORG.BW

 country-code Botswana Communications Regulatory Authority (BOCRA)
53

.ORG.BZ

 country-code University of Belize
54

.ORG.CN

 country-code China Internet Network Information Center (CNNIC)
55

.ORG.CO

 country-code Ministry of Information and Communications Technologies (MinTIC)
56

.ORG.CY

 country-code University of Cyprus
57

.ORG.DO

 country-code Pontificia Universidad Catolica Madre y Maestra Recinto Santo Tomas de Aquino
58

.ORG.EG

 country-code Egyptian Universities Network (EUN) Supreme Council of Universities
59

.ORG.ES

 country-code Red.es
60

.ORG.ET

 country-code Ethio telecom
61

.ORG.GE

 country-code Caucasus Online LLC
62

.ORG.GG

 country-code Island Networks Ltd.
63

.ORG.GH

 country-code Network Computer Systems Limited
64

.ORG.GR

 country-code ICS-FORTH GR
65

.ORG.GY

 country-code University of Guyana
66

.ORG.HK

 country-code Hong Kong Internet Registration Corporation Ltd.
67

.ORG.HU

 country-code Council of Hungarian Internet Providers (CHIP)
68

.ORG.IL

 country-code The Israel Internet Association (RA)
69

.ORG.IM

 country-code Isle of Man Government
70

.ORG.IN

 country-code National Internet Exchange of India
71

.ORG.IR

 country-code Institute for Research in Fundamental Sciences
72

.ORG.JE

 country-code Island Networks (Jersey) Ltd.
73

.ORG.JM

 country-code University of West Indies
74

.ORG.JO

 country-code Ministry of Digital Economy and Entrepreneurship (MoDEE)
75

.ORG.KH

 country-code Telecommunication Regulator of Cambodia (TRC)
76

.ORG.KW

 country-code Communications and Information Technology Regulatory Authority
77

.ORG.KY

 country-code Utility Regulation and Competition Office (OfReg)
78

.ORG.KZ

 country-code Association of IT Companies of Kazakhstan
79

.ORG.LA

 country-code Lao National Internet Committee (LANIC), Ministry of Posts and Telecommunications
80

.ORG.LB

 country-code American University of Beirut Computing and Networking Services
81

.ORG.LC

 country-code University of Puerto Rico
82

.ORG.LS

 country-code Lesotho Network Information Centre Proprietary (LSNIC)
83

.ORG.LY

 country-code General Post and Telecommunication Company
84

.ORG.MA

 country-code Agence Nationale de Réglementation des Télécommunications (ANRT)
85

.ORG.MK

 country-code Macedonian Academic Research Network Skopje
86

.ORG.MO

 country-code Macao Post and Telecommunications Bureau (CTT)
87

.ORG.MT

 country-code NIC (Malta)
88

.ORG.MV

 country-code Dhiraagu Pvt. Ltd. (DHIVEHINET)
89

.ORG.MW

 country-code Malawi Sustainable Development Network Programme (Malawi SDNP)
90

.ORG.MX

 country-code NIC-Mexico ITESM - Campus Monterrey
91

.ORG.MY

 country-code MYNIC Berhad
92

.ORG.MZ

 country-code Centro de Informatica de Universidade Eduardo Mondlane
93

.ORG.NA

 country-code Namibian Network Information Center
94

.ORG.NG

 country-code Nigeria Internet Registration Association
95

.ORG.NI

 country-code Universidad Nacional del Ingernieria Centro de Computo
96

.ORG.NP

 country-code Mercantile Communications Pvt. Ltd.
97

.ORG.NZ

 country-code InternetNZ
98

.ORG.OM

 country-code Telecommunications Regulatory Authority (TRA)
99

.ORG.PA

 country-code Universidad Tecnologica de Panama
100

.ORG.PE

 country-code Red Cientifica Peruana
101

.ORG.PH

 country-code PH Domain Foundation
102

.ORG.PK

 country-code PKNIC
103

.ORG.PL

 country-code Research and Academic Computer Network
104

.ORG.PR

 country-code Gauss Research Laboratory Inc.
105

.ORG.PT

 country-code Associação DNS.PT
106

.ORG.PY

 country-code NIC-PY
107

.ORG.QA

 country-code Communications Regulatory Authority
108

.ORG.RO

 country-code National Institute for R&D in Informatics
109

.ORG.RS

 country-code Serbian National Internet Domain Registry (RNIDS)
110

.ORG.RU

 country-code Coordination Center for TLD RU
111

.ORG.RW

 country-code Rwanda Internet Community and Technology Alliance (RICTA) Ltd
112

.ORG.SA

 country-code Communications and Information Technology Commission
113

.ORG.SB

 country-code Solomon Telekom Company Limited
114

.ORG.SG

 country-code Singapore Network Information Centre (SGNIC) Pte Ltd
115

.ORG.SV

 country-code SVNet
116

.ORG.SZ

 country-code University of Swaziland Department of Computer Science
117

.ORG.TN

 country-code Agence Tunisienne d'Internet
118

.ORG.TR

 country-code Bilgi Teknolojileri ve İletişim Kurumu (BTK)
119

.ORG.TT

 country-code University of the West Indies Faculty of Engineering
120

.ORG.TW

 country-code Taiwan Network Information Center (TWNIC)
121

.ORG.UA

 country-code Hostmaster Ltd.
122

.ORG.UK

 country-code Nominet UK
123

.ORG.VE

 country-code Comisión Nacional de Telecomunicaciones (CONATEL)
124

.ORG.VN

 country-code Viet Nam Internet Network Information Center (VNNIC)
125

.ORG.ZM

 country-code Zambia Information and Communications Technology Authority (ZICTA)
126

.ORG.ZW

 country-code Postal and Telecommunications Regulatory Authority of Zimbabwe (POTRAZ)
127

.ORGANIC

 generic Afilias Limited
128

.ORIENTEXPRESS

 generic Retired
129

.ORIGINS

 generic The Estée Lauder Companies Inc.
130

.OS.UK

 country-code Nominet UK
131

.OSAKA

 generic Osaka Registry Co., Ltd.
132

.OSAKA.JP

 country-code Japan Registry Services Co., Ltd.
133

.OSTRODA.PL

 country-code Research and Academic Computer Network
134

.OTSUKA

 generic Otsuka Holdings Co., Ltd.
135

.OTT

 generic Dish DBS Corporation
136

.OVH

 generic OVH SAS
137

.OZ-DMR.UK

 country-code Nominet UK
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