Single-letter second-level domains are domains in which the second-level domain of the domain name consists of only one letter, such as X.com. In 1993, the Internet Assigned Numbers Authority (IANA) explicitly reserved all single-letter and single-digit second-level domains under the top-level domains com, net, and org, and grandfathered those that had already been assigned. In December 2005, ICANN considered auctioning these domain names.
Active single-letter domains
On December 1, 1993, the Internet Assigned Numbers Authority (IANA) explicitly reserved the remaining single-letter and single-digit domain names. The few domains that were already assigned were grandfathered in and continued to exist.[better source needed]
|Domain Name||1993 Owner||Current Owner|
|i.net||INet Solutions Ltd||Saw.com|
|q.com||JG||Lumen Technologies (dba Quantum Fiber)|
|q.net||Privately owned||Privately owned|
|z.com||HomePage.com||GMO Internet, Inc.|
The .org TLD was subsequently reopened for single-letter domain registrations. These and selected other gTLD and ccTLD single-letter domain names currently in use, typically as shortcuts, are listed below.
|Domain Name||Current User||Usage|
|a.co||Amazon.com||Amazon's official URL shortcut. Generally used by Amazon in SMS messages for informing purchasers of activity on an order|
|c.im||C.IM is a general, mainly English-speaking Mastodon instance.|
|c.org||change.org||Shortcut to change.org|
|d.co.il||Zap Golden Pages|
|d.gs||Dragonsayen||Shortcut used by dragonsayen.com (DraGonSayen)|
|d.tube||DTube||Crypto-based and decentralized video-sharing platform|
|e.im||MailTime||URL shortcut for MailTime Email Messenger|
|g.cn||Google's official URL shortcut to help Chinese users locate google|
|g.co||Google's official URL shortcut|
|g.gg||Global Grid Gallery|
|k.tt||Citynews SpA||Used as URL shortcut for https://citynews.it local news, owned by Krzysztof K. Wasielewski|
|l.ink||Top Level Design|
|m.co||Volvo Cars||Volvo Cars' car sharing service, M|
|m.me||Facebook Messenger's official URL shortcut|
|m.page||mmm.page||URL shortcut for mmm.page website builder|
|n.pr||NPR||URL shortcut for public radio network NPR|
|o.co||Overstock.com||URL shortcut for Overstock.com|
|s.co||Snap Inc.||Shortcut to Snapchat's download page|
|s.de||Sparkassen-Finanzportal||Shortcut to sparkasse.de|
|t.co||Twitter's official URL shortcut|
|t.me||Telegram||Telegram's official URL shortcut|
|u.ae||United Arab Emirates||The United Arab Emirates' Government portal|
|v.me||Visa Inc.||Visa's official URL shortcut|
|w.org||WordPress||Redirects to wordpress.org, has some assets for wordpress.org (under s.w.org)|
|w.wiki||Wikimedia Foundation||The official Wikimedia Foundation URL Shortener|
|y.org||YMCA of the United States||Shortcut to YMCA|
Many other single-letter second-level domains have been registered under country code top-level domains. The list of country code top-level domains which have been identified to allow single-letter domains are:
Non-ASCII single-character domains
Single-character non-ASCII second-level domains also exist (as seen below), also known as Internationalized domain names (IDN), these domains are actually registered as their Punycode translations (which are more than a single character) for DNS purposes. ICANN oversees a process for determining registration rules that involves wide-ranging stakeholder input and assorted Working Groups. In the case of .com domains, decisions are then implemented by Verisign, the contracted backend operator for the .com registry. The result is a list of 96,957 codepoints allowed for IDN registrations. As mentioned above, some additional domains previously-registered are "grandfathered" and remain active. Many gTLDs also allow IDN registration.
These 96,957 distinct IDN characters eligible for registration in .com are the essential building-blocks of languages worldwide. A single letter domain does not provide the context found in a longer string or group of words. They may appear similar to one another or to other English / Latin characters; due to this potential for confusion, browsers have restricted the characters that may be rendered and will display the restricted characters in their Punycode form. They are sometimes used as pictorial symbols and memorable links.
|Internationalized Domain Name (IDN)||Punycode Domain + TLD||Usage||Registration Date / Registrar (WHOIS entry)||URL (IDN)||URL (Punycode Domain + TLD)|
|ꓸ.com||xn--8m8a.com||virtual collectible / digital asset||15 July 2017 / Dynadot LLC||https://ꓸ.com||https://xn--8m8a.com|
|ꓮ.com||xn--ym8a.com||virtual collectible / digital asset||18 July 2017 / Dynadot LLC||https://ꓮ.com||https://xn--ym8a.com|
|𐊠.com||xn--967c.com||01 January 2020 / Name.com, Inc.|
|ᗅ.com||xn--upe.com||Former StrongestBrands URL shortcut||26 December 2015 / Name.com, Inc.||http://ᗅ.com||http://xn--upe.com|
|Ꭺ.com||xn--g9d.com||18 February 2015 / Name.com, Inc.|
|Ậ.com||xn--zkg.com||2-5.org ||18 April 2021 / Google LLC|
|𐊡.com||xn--b77c.com||26 Shirts' official URL shortcut||06 July 2019 / Name.com, Inc.|
|ꓚ.com||xn--em8a.com||virtual collectible / digital asset||18 July 2017 / Dynadot LLC||https://ꓚ.com||https://xn--em8a.com|
|ꓓ.com||xn--6l8a.com||virtual collectible / digital asset||18 July 2017 / Dynadot LLC||https://ꓓ.com||https://xn--6l8a.com|
|ꓰ.com||xn--0m8a.com||virtual collectible / digital asset||18 July 2017 / Dynadot LLC||https://ꓰ.com||https://xn--0m8a.com|
|𐊤.com||xn--e77c.com||erikw.com||30. April 2018 / NameCheap, Inc.|
|𐊥.com||xn--f77c.com||Nick Davenport IQinternet.net & DBSTrust.com, UK||29 April 2020 / GoDaddy.com, LLC||http://𐊥.com||http://xn--f77c.com|
|ꓖ.com||xn--9l8a.com||virtual collectible / digital asset||18 July 2017 / Dynadot LLC||https://ꓖ.com||https://xn--9l8a.com|
|ꓧ.com||xn--rm8a.com||virtual collectible / digital asset||08 July 2018 / Dynadot LLC||https://ꓧ.com||https://xn--rm8a.com|
|ꓲ.com||xn--2m8a.com||virtual collectible / digital asset||18 July 2017 / Dynadot LLC||https://ꓲ.com||https://xn--2m8a.com|
|𐊦.com||xn--g77c.com||29 April 2018 / GoDaddy.com, LLC|
|Ī.com||xn--5ea.com||2-5.org||09 April 2021 / Google LLC|
|ḷ.com||xn--mhg.com||26 July 2017 / Internet Domain Service BS Corp|
|ㆲ.com||xn--3jk.com||3 December 2022 / GoDaddy, LLC||https://ㆲ.com||https://xn--3jk.com|
|ꓙ.com||xn--dm8a.com||virtual collectible / digital asset||18 July 2017 / Dynadot LLC||https://ꓙ.com||https://xn--dm8a.com|
|ꓗ.com||xn--bm8a.com||virtual collectible / digital asset||18 July 2017 / Dynadot LLC||https://ꓗ.com||https://xn--bm8a.com|
|ꓡ.com||xn--lm8a.com||virtual collectible / digital asset||18 July 2017 / Dynadot LLC||https://ꓡ.com||https://xn--lm8a.com|
|ꓟ.com||xn--jm8a.com||virtual collectible / digital asset||18 July 2017 / Dynadot LLC||https://ꓟ.com||https://xn--jm8a.com|
|𐊰.com||xn--q77c.com||Mahdi Taghizadeh's official URL shortcut||16 April 2018 / NameCheap, Inc.|
|ƞ.com||xn--gia.com||virtual collectible / digital asset||28 December 2020 / Dynadot LLC||https://Ƞ.com||https://xn--gia.com|
|ꓠ.com||xn--km8a.com||virtual collectible / digital asset||18 July 2017 / Dynadot LLC||https://ꓠ.com||https://xn--km8a.com|
|𐊪.com||xn--k77c.com||10 May 2018 / GoDaddy.com, LLC|
|ꚡ.com||xn--ez8a.com||NES Natural Endocrinology Specialists||10 February 2021 / Google LLC|
|ꓳ.com||xn--3m8a.com||virtual collectible / digital asset||18 July 2017 / Dynadot LLC||https://ꓳ.com||https://xn--3m8a.com|
|〇.com||xn--w6j.com||Started by Cancer, Memorial||28 February 2006 / DomainSite, Inc.|
|𐊫.com||xn--l77c.com||Simon Young Institution.co.uk official shortcut||28 April 2020 / CSL Computer Service Langenbach GmbH d/b/a joker.com|
|ᩅ.com||xn--rnf.com||11 August 2018 / Dynadot LLC|
|ዐ.net||xn--72d.net||NOC of the Internet||14 January 2021 / Google LLC||https://ዐ.net||https://xn--72d.net|
|ᴩ.com||xn--w8f.com||25 December 2011 / Name.com, Inc.|
|ꓣ.com||xn--nm8a.com||virtual collectible / digital asset||18 July 2017 / Dynadot LLC||https://ꓣ.com||https://xn--nm8a.com|
|𐊯.com||xn--p77c.com||27 April 2021 / Google LLC|
|ꓢ.com||xn--mm8a.com||virtual collectible / digital asset||18 July 2017 / Dynadot LLC||https://ꓢ.com||https://xn--mm8a.com|
|ꜱ.com||xn--i38a.com||15 November 2013 / Name.com, Inc.|
|ꕷ.com||xn--vq8a.com||Landlord Insurance Startup Steadily URL shortcut||04 June 2021 / Google LLC|
|ꓔ.com||xn--7l8a.com||virtual collectible / digital asset||18 July 2017 / Dynadot LLC||https://ꓔ.com||https://xn--7l8a.com|
|ፐ.com||xn--v6d.com||Crypto Chain University's official URL shortcut||10 December 2014 / Tucows Domains Inc.|
|ţ.com||xn--rga.com||don Pablo donPabloNow.com official shortcut||18 February 2021 / NameCheap, Inc.|
|ꓴ.com||xn--4m8a.com||virtual collectible / digital asset||18 July 2017 / Dynadot LLC||https://ꓴ.com||https://xn--4m8a.com|
|𐋊.com||xn--h87c.com||10 May 2018 / GoDaddy.com, LLC|
|ꓦ.com||xn--qm8a.com||virtual collectible / digital asset||18 July 2017 / Dynadot LLC||https://ꓦ.com||https://xn--qm8a.com|
|ꛟ.com||xn--508a.com||Veritas Home Buyers official URL shortcut||10 February 2021 / Google LLC|
|ꓪ.com||xn--um8a.com||virtual collectible / digital asset||18 July 2017 / Dynadot LLC||https://ꓪ.com||https://xn--um8a.com|
|ꓫ.com||xn--vm8a.com||virtual collectible / digital asset||18 July 2017 / Dynadot LLC||https://ꓫ.com||https://xn--vm8a.com|
|☓.com||xn--33h.com||Herbert R. Sim's official URL shortcut||03 February 2005 / Tucows Domains Inc.|
|ꓬ.com||xn--wm8a.com||virtual collectible / digital asset||18 July 2017 / Dynadot LLC||https://ꓬ.com||https://xn--wm8a.com|
|𐊲.com||xn--s77c.com||AnaptysBio's official URL shortcut||02 March 2018 / Name.com, Inc.||http://𐊲.com||http://xn--s77c.com|
|ꓜ.com||xn--gm8a.com||virtual collectible / digital asset||18 July 2017 / Dynadot LLC||https://ꓜ.com||https://xn--gm8a.com|
|ꛉ.com||xn--j08a.com||The Trusted Home Buyer official URL shortcut||05 May 2021 / Google LLC|
|ッ.top||xn--9ck.top||virtual collectible / digital asset||27 January 2016 / Dynadot LLC||https://ッ.top||https://xn--9ck.top|
|ツ.top||xn--bdk.top||virtual collectible / digital asset||28 February 2022 / Dynadot LLC||https://ツ.top||https://xn--bdk.top|
|シ.top||xn--xck.top||virtual collectible / digital asset||28 February 2022 / Dynadot LLC||https://シ.top||https://xn--xck.top|
|𐋇.com||xn--e87c.com||21 January 2018 / Google LLC|
|𓂺.com||xn--hu7d.com||virtual collectible / digital asset||11 January 2019 / Dynadot LLC||https://𓂺.com||https://xn--hu7d.com|
|ㆺ.com||xn--ckk.com||iSellSquares.com Homepage||27 February 2020 / GoDaddy.com, LLC|
|☺.com||xn--74h.com||Daniel Früh's official URL shortcut||03 June 2004 / DomainSite, Inc.|
|ツ.com||xn--bdk.com||29 June 2019 / NameSilo, LLC|
|ꙮ.com||xn--xx8a.com||17 October 2018 / GoDaddy.com, LLC|
|ʘ.com||xn--lpa.com||17 July 2015 / Name.com, Inc.|
|ʢ.com||xn--vpa.com||don Pablo donPabloNow.com official shortcut||27 February 2022 / NameCheap, Inc.|
|ư.com||xn--yia.com||19 August 2018 / GoDaddy.com, LLC|
|ॐ.com||xn--q3b.com||19 April 2001 / Name.com, Inc.||http://ॐ.com||http://xn--q3b.com|
|৬.com||xn--67b.com||Shortcut to AIEDGE||17 September 2021 / Sav.com, LLC||http://৬.com||http://xn--67b.com/|
|ௐ.com||xn--0mc.com||15 August 2020 / NameCheap, Inc.|
|தீ.com||xn--rlc0d.com||17 January 2019 / Google LLC|
|தீ.இந்தியா||xn--rlc0d.xn--xkc2dl3a5ee0h||06 April 2021 / Dynadot LLC|
In 2012, the Public Interest Registry (PIR) initiated Project94, in which 94 one- and two-letter domains in the top-level domain org, that had been traditionally reserved, are awarded to qualifying organizations.
Market value of single- or two-letter domains
Only three of the 26 possible single-letter domains have ever been registered under the .com domain, all before 1992. The other 23 single-letter .com domain names were registered January 1, 1992 by Jon Postel, with the intention to avoid a single company commercially controlling a letter of the alphabet. Many but not all .com two-letter domain names are among the most valuable domain names.
While it is widely believed that the domain names business.com and sex.com have been the most valuable domain name transactions, prominent two-letter domain names have only been sold after nondisclosed transactions handled by specialized broker and law firms.
The value of the LG Corp (the South Korean electronics conglomerate formerly known as Lucky-Goldstar) purchase of LG.com was never published. LG Group missed the first sale of the domain name in 2008 from the original owner the chemical company Lockwood Greene to the dot-com entrepreneur Andy Booth; Booth had used it to launch a footballing website known as LifeGames. LG Corp bought "lg.com" one year later, in 2009. Following the purchase, LG Group changed worldwide marketing to LG.com, which is now their central internet address for all countries. All national LG country domain names like "LG.de" or "LG.com.mx" redirect to "LG.com".
With the 2005 announcement that registration of the remaining single-letter names might become available, some companies have attempted to establish a right to the names by claiming trademark rights over single letters used in such a context. U magazine, a college-oriented publication, went so far as to rebrand its website as "U.com" and apply for a trademark registration of the same phrase, before sending a letter to ICANN attempting to gain priority for the domain if it should ever become available in the future.
- Bill Manning; Eric Brunner; Donald Eastlake (March 2000). "I-D draft-ietf-dnsind-iana-dns-01". IETF. p. 15.
- "i.net domain name is for sale. Inquire now". sell.sawbrokers.com. Retrieved 2022-06-03.
- Lumen Technologies (September 14, 2020). "CenturyLink Transforms, Rebrands as Lumen" (Press release). Retrieved October 7, 2022.
Lumen is pleased to announce Quantum Fiber, a fully digital platform for delivering fiber-based products and services to residents and small businesses.
- "Q.NET - remembering Desmond Llewelyn". Q.
- "The V Foundation for Cancer Research founded by Jim Valvano". V Foundation. Retrieved 2022-07-31.
- One and Two Letter .IE Domains Now Available "The release of short .ie domain names " Dublin, 12 October 2015
- ISNIC Icelandic Domain Rules, Retrieved on 22 September 2021.
- Verisign The World's Shortest Domain Names: How To Get a One Character Domain, Copenhagen, 01 December 2014. Retrieved on 04 December 2014.
- Verisign Registration Rules: Allowed Code Points, Reston VA, 01 July 2011. Retrieved on 06 April 2019.
- Roig, Jonathan. "TLD Search". WeirdOneCharacterDomainSuperstore. Retrieved 29 July 2019.
- Project 94
- "ICANN Establishes Forum on Allocation Methods for Single-Letter and Single-Digit Domain Names". ICANN. Retrieved 15 July 2017.
- Transaction of the FB.com domain
- "IG.com sells for $4.7 Million". morganlinton.com.
- Michael Berkens. "Z.com Sold For $6.8 Million Dollars". TheDomains.com.
- "U.com letter" (PDF). icann.org.
- ICANN - Reserved domain names
- Icann Blog Internet Corporation for Assigned Names and Numbers
- Web's hottest real estate could go on sale, an Associated Press article about the possible release of one letter .coms written in 2005.