.gb

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.gb
Introduced1985

TLD type		Country code top-level domain
StatusUnused
Actual useFallen into disuse in favour of .uk
Registration restrictionsNo registrations presently being taken
StructureGovernment sites formerly found under hmg.gb
Dispute policiesNone
Registry WebsiteNone

.gb is a reserved Internet country code top-level domain (ccTLD) of the United Kingdom.


The domain was introduced with RFC 920[1] in October 1984 that set out the creation of ccTLD generally using country codes derived from the corresponding two-letter code in the ISO 3166-1 list. However, the .uk domain had been created separately a few months before the compilation of this list.[2] Consequently, .gb was never widely used. It is no longer possible to register under this domain.


.gb was used for a number of years, mainly by British government organisations and commercial e-mail services using X.400-based e-mail infrastructure. This simplified translating between DNS domains and X.400 addresses, which used "GB" as a country code.[3]


With the demise of X.400 e-mail and IANA's general aim of one TLD per country, use of .gb declined; the domain remains in existence, but it is not currently open to new domain registrations.


As of 2018[update], dra.hmg.gb still exists, with at least three subdomains resolving through DNS (although none serve a website): hermes.dra.hmg.gb, delos.dra.hmg.gb, and dfhnet.dra.hmg.gb.[4][5][6] The domain was originally owned by the Defence Research Agency,[7] which became the Defence Evaluation and Research Agency in 1995 and was split into QinetiQ and the Defence Science and Technology Laboratory in 2001; the website became defunct some time thereafter.[8][9]



References




  1. ^ J. Postel and J. Reynolds (October 1984), Request for Comments: 920, Network Working Group.mw-parser-output cite.citationfont-style:inherit.mw-parser-output qquotes:"""""""'""'".mw-parser-output code.cs1-codecolor:inherit;background:inherit;border:inherit;padding:inherit.mw-parser-output .cs1-lock-free abackground:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration abackground:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center.mw-parser-output .cs1-lock-subscription abackground:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registrationcolor:#555.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration spanborder-bottom:1px dotted;cursor:help.mw-parser-output .cs1-hidden-errordisplay:none;font-size:100%.mw-parser-output .cs1-visible-errorfont-size:100%.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-formatfont-size:95%.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-leftpadding-left:0.2em.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-rightpadding-right:0.2em


  2. ^ Milton Mueller (2002), Ruling the Root: Internet Governance and the Taming of Cyberspace, Cambridge, Massachusetts: MIT Press, p. 79, ISBN 9780262632980


  3. ^ Crepin-Leblond, Olivier M. J. (2003). "International E-mail Accessibility". Archived from the original on 21 May 2008. Retrieved 23 June 2008.


  4. ^ "DNS lookup for hermes.dra.hmg.gb". Retrieved 7 March 2016 – via Google Apps Toolbox.


  5. ^ "DNS lookup for delos.dra.hmg.gb". Retrieved 7 March 2016 – via Google Apps Toolbox.


  6. ^ "DNS lookup for dfhnet.dra.hmg.gb". Retrieved 7 March 2016 – via Google Apps Toolbox.


  7. ^ Gollman, Dieter, ed. (November 1994). "A Consideration of the Modes of Operation for Secure Systems". Computer Security – ESORICS 94. Brighton: Springer-Verlag. p. 335. ISBN 978-3-540-58618-0.


  8. ^ "DERA". DERA. Archived from the original on 17 May 2001. Retrieved 26 November 2006.


  9. ^ "Page not found". DERA. Archived from the original on 27 March 2002. Retrieved 26 November 2006.




External links


  • IANA .gb whois information

  • JANET(UK) website


  • www.dra.hmg.gb Last accessible copy of www.dra.hmg.gb in the Internet Archive


  • Official country code for Britain = GB or UK? Email discussion on GB domain (2002) with historical zonefiles.










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