This list of Internet top-level domain extensions contains top-level domains, which are those domains in the DNS root zone of the Domain Name System of the Internet. The official list of all top-level domains is maintained by the Internet Assigned Numbers Authority (IANA) at the Root Zone Database. IANA also oversees the approval process for new proposed top-level domains. As of February 2017, the root domain contains 1528 top-level domains, while a few have been retired and are no longer functional.
Types
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IANA distinguishes the following groups of top-level domains:
- infrastructure top-level domain (ARPA)
- generic top-level domains (gTLD)
- restricted generic top-level domains (grTLD)
- sponsored top-level domains (sTLD)
- country code top-level domains (ccTLD)
- test top-level domains (tTLD)
Original top-level domains
Seven generic top-level domains were created early in the development of the Internet, and predate the creation of ICANN in 1998.
- Name: DNS names
- Entity: intended use
- Notes: general remarks
- IDN: support for internationalized domain names (IDN)
- DNSSEC: presence of DS records for Domain Name System Security Extensions
Infrastructure top-level domain
Country code top-level domains
As of May 20, 2017, there were 255 Country code top-level domains. (For comparison, at the same time the United Nations comprised 193 countries.)
A
B
C
D
E
F
G
H
I / J
K
L
M
N
O / P / Q
R
S
T
U / V
W - Z
Notes
Internationalized country code top-level domains
Source:
Proposed internationalized ccTLDs
ICANN-era generic top-level domains
- Name: DNS name
- Target market: intended use
- Restrictions: restrictions, if any, on who can register, and how the domain can be used
- Operator: entity the registry has been delegated to
- IDN: support for internationalized domain names (IDN)
- DNSSEC: presence of DS records for Domain Name System Security Extensions
English
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
Chinese
French
German
Hindi
Italian
Portuguese
Spanish
Internationalized generic top-level domains
All of these TLDs are internationalized domain names (IDN) and support second-level IDNs.
- Notes: general remarks and intended use
- DNSSEC: presence of DS records for Domain Name System Security Extensions
Arabic script
Chinese characters
Cyrillic script
Other script
Geographic top-level domains
- Name: DNS name
- Entity: Target geographic area
- Notes: general remarks
- IDN: support for internationalized domain names (IDN)
- DNSSEC: presence of DS records for Domain Name System Security Extensions
Africa
Asia
Europe
North America
Oceania
South America
Internationalized geographic top-level domains
Brand top-level domains
- Name: DNS name
- Entity: company and/or brand
- Notes: general remarks
- IDN: support for internationalized domain names (IDN)
- DNSSEC: presence of DS records for Domain Name System Security Extensions
Internationalized brand top-level domains
Special-Use Domains
ICANN/IANA has created some Special-Use domain names which are meant for special technical purposes. ICANN/IANA owns all of the Special-Use domain names.
See also
- Generic top-level domain
- Country code top-level domain
- Proposed top-level domain
- IDN Test TLDs
- ISO 3166-1 alpha-2, the standard for two-letter country codes, which most ccTLDs are based on
- Second-level domain, information about .co.jp, .co.uk, .co.kr, .co.nf, etc.
References
External links
- IANA's list of TLDs
- IANA's list of TLDs in machine-readable format
- The Internet Domain Survey
- The Public Suffix List / PSL â€" Maintained by Mozilla
- Open Root Server Network's list of active TLDs
- Registry Agreements at ICANN