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

.OBI

generic OBI Group Holding SE & Co. KGaA
2

.OBSERVER

generic Dog Beach, LLC
3

.OD.UA

country-code Hostmaster Ltd.
4

.OF.BY

country-code Reliable Software, Ltd.
5

.OFF

generic Not assigned
6

.OFFICE

generic Microsoft Corporation
7

.OH.US

country-code Registry Services, LLC
8

.OKINAWA

generic BRregistry, Inc.
9

.OLAYAN

generic Crescent Holding GmbH
10

.OLAYANGROUP

generic Crescent Holding GmbH
11

.OLDNAVY

generic The Gap, Inc.
12

.OLLO

generic Dish DBS Corporation
13

.OM

country-code Telecommunications Regulatory Authority (TRA)
14

.OMEGA

generic The Swatch Group Ltd
15

.ON.CA

country-code Canadian Internet Registration Authority (CIRA) Autorité Canadienne pour les enregistrements Internet (ACEI)
16

.ONE

generic One.com A/S
17

.ONG

generic Public Interest Registry
18

.ONL

generic iRegistry GmbH
19

.ONLINE

generic Radix FZC
20

.ONLINE.TH

country-code Thai Network Information Center Foundation
21

.ONYOURSIDE

generic Not assigned
22

.OOO

generic INFIBEAM INCORPORATION LIMITED
23

.OPEN

generic American Express Travel Related Services Company, Inc.
24

.OPENINGTIMESIN.UK

country-code Nominet UK
25

.OPOLE.PL

country-code Research and Academic Computer Network
26

.OR.AT

country-code nic.at GmbH
27

.OR.ID

country-code Perkumpulan Pengelola Nama Domain Internet Indonesia (PANDI)
28

.OR.JP

country-code Japan Registry Services Co., Ltd.
29

.OR.KR

country-code Korea Internet & Security Agency (KISA)
30

.OR.TH

country-code Thai Network Information Center Foundation
31

.OR.TZ

country-code Tanzania Communications Regulatory Authority
32

.OR.UG

country-code Uganda Online Ltd.
33

.OR.US

country-code Registry Services, LLC
34

.ORACLE

generic Oracle Corporation
35

.ORANGE

generic Orange Brand Services Limited
36

.ORG

generic Public Interest Registry (PIR)
37

.ORG.AE

country-code Telecommunications and Digital Government Regulatory Authority (TDRA)
38

.ORG.AF

country-code Ministry of Communications and IT
39

.ORG.AL

country-code Electronic and Postal Communications Authority - AKEP
40

.ORG.AR

country-code Presidencia de la Nación – Secretaría Legal y Técnica
41

.ORG.AU

country-code .au Domain Administration (auDA)
42

.ORG.AZ

country-code IntraNS
43

.ORG.BD

country-code Posts and Telecommunications Division
44

.ORG.BH

country-code Telecommunications Regulatory Authority (TRA)
45

.ORG.BO

country-code Agencia para el Desarrollo de la Información de la Sociedad en Bolivia
46

.ORG.BR

country-code Comite Gestor da Internet no Brasil
47

.ORG.BS

country-code University of The Bahamas
48

.ORG.BZ

country-code University of Belize
49

.ORG.CN

country-code China Internet Network Information Center (CNNIC)
50

.ORG.CO

country-code Ministry of Information and Communications Technologies (MinTIC)
51

.ORG.CY

country-code University of Cyprus
52

.ORG.DO

country-code Pontificia Universidad Catolica Madre y Maestra Recinto Santo Tomas de Aquino
53

.ORG.EG

country-code Egyptian Universities Network (EUN) Supreme Council of Universities
54

.ORG.ES

country-code Red.es
55

.ORG.ET

country-code Ethio telecom
56

.ORG.GE

country-code Caucasus Online LLC
57

.ORG.GH

country-code Network Computer Systems Limited
58

.ORG.GR

country-code ICS-FORTH GR
59

.ORG.GY

country-code University of Guyana
60

.ORG.HK

country-code Hong Kong Internet Registration Corporation Ltd.
61

.ORG.IL

country-code The Israel Internet Association (RA)
62

.ORG.IM

country-code Isle of Man Government
63

.ORG.IN

country-code National Internet Exchange of India
64

.ORG.IR

country-code Institute for Research in Fundamental Sciences
65

.ORG.JE

country-code Island Networks (Jersey) Ltd.
66

.ORG.JM

country-code University of West Indies
67

.ORG.JO

country-code Ministry of Digital Economy and Entrepreneurship (MoDEE)
68

.ORG.KH

country-code Telecommunication Regulator of Cambodia (TRC)
69

.ORG.KW

country-code Communications and Information Technology Regulatory Authority
70

.ORG.LA

country-code Lao National Internet Committee (LANIC), Ministry of Posts and Telecommunications
71

.ORG.LB

country-code American University of Beirut Computing and Networking Services
72

.ORG.LC

country-code University of Puerto Rico
73

.ORG.MA

country-code Agence Nationale de Réglementation des Télécommunications (ANRT)
74

.ORG.MK

country-code Macedonian Academic Research Network Skopje
75

.ORG.MT

country-code NIC (Malta)
76

.ORG.MV

country-code Dhiraagu Pvt. Ltd. (DHIVEHINET)
77

.ORG.MX

country-code NIC-Mexico ITESM - Campus Monterrey
78

.ORG.MY

country-code MYNIC Berhad
79

.ORG.MZ

country-code Centro de Informatica de Universidade Eduardo Mondlane
80

.ORG.NA

country-code Namibian Network Information Center
81

.ORG.NG

country-code Nigeria Internet Registration Association
82

.ORG.NI

country-code Universidad Nacional del Ingernieria Centro de Computo
83

.ORG.NP

country-code Mercantile Communications Pvt. Ltd.
84

.ORG.NZ

country-code InternetNZ
85

.ORG.OM

country-code Telecommunications Regulatory Authority (TRA)
86

.ORG.PA

country-code Universidad Tecnologica de Panama
87

.ORG.PE

country-code Red Cientifica Peruana
88

.ORG.PH

country-code PH Domain Foundation
89

.ORG.PK

country-code PKNIC
90

.ORG.PL

country-code Research and Academic Computer Network
91

.ORG.PT

country-code Associação DNS.PT
92

.ORG.PY

country-code NIC-PY
93

.ORG.QA

country-code Communications Regulatory Authority
94

.ORG.RO

country-code National Institute for R&D in Informatics
95

.ORG.RS

country-code Serbian National Internet Domain Registry (RNIDS)
96

.ORG.RU

country-code Coordination Center for TLD RU
97

.ORG.RW

country-code Rwanda Internet Community and Technology Alliance (RICTA) Ltd
98

.ORG.SA

country-code Communications and Information Technology Commission
99

.ORG.SB

country-code Solomon Telekom Company Limited
100

.ORG.SG

country-code Singapore Network Information Centre (SGNIC) Pte Ltd
101

.ORG.SZ

country-code University of Swaziland Department of Computer Science
102

.ORG.TN

country-code Agence Tunisienne d'Internet
103

.ORG.TR

country-code Bilgi Teknolojileri ve İletişim Kurumu (BTK)
104

.ORG.TT

country-code University of the West Indies Faculty of Engineering
105

.ORG.TW

country-code Taiwan Network Information Center (TWNIC)
106

.ORG.UA

country-code Hostmaster Ltd.
107

.ORG.UK

country-code Nominet UK
108

.ORG.VE

country-code Comisión Nacional de Telecomunicaciones (CONATEL)
109

.ORG.VN

country-code Viet Nam Internet Network Information Center (VNNIC)
110

.ORG.ZM

country-code Zambia Information and Communications Technology Authority (ZICTA)
111

.ORG.ZW

country-code Postal and Telecommunications Regulatory Authority of Zimbabwe (POTRAZ)
112

.ORGANIC

generic Afilias Limited
113

.ORIENTEXPRESS

generic Retired
114

.ORIGINS

generic The Estée Lauder Companies Inc.
115

.OSAKA

generic Osaka Registry Co., Ltd.
116

.OSAKA.JP

country-code Japan Registry Services Co., Ltd.
117

.OSTRODA.PL

country-code Research and Academic Computer Network
118

.OTSUKA

generic Otsuka Holdings Co., Ltd.
119

.OTT

generic Dish DBS Corporation
120

.OVH

generic OVH SAS
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