|TLD type||Country code top-level domain|
|Status||Not in use|
|Intended use||Entities connected with East Germany|
|Actual use||Only internally; unused since German reunification|
|Registration restrictions||No registrations are now taking place|
|Structure||Not in root|
.dd was the assigned country code top-level domain (ccTLD) for the German Democratic Republic (East Germany). It was chosen based on the ISO 3166-1 alpha-2 code for the German Democratic Republic, the letters coming from the German name of the country: Deutsche Demokratische Republik. In accordance with IANA policy, .dd was therefore available to be assigned as the country code top-level domain (ccTLD) for East Germany. However, this was never done, and so .dd was never added to the root nameservers. Its only use was internally in an isolated network among the universities of Jena and Dresden and presumably Rostock.
With the reunification of Germany, East Germany became part of the Federal Republic of Germany (West Germany), which had already been assigned the ccTLD .de. The ISO 3166-1 code "DD" was withdrawn in 1990.
- Information site about .dd in German
- Mey, Stefan (2014-10-03). ".dd-Ex = DDR: Die untergegangene Top-Level-Domain". heise online (in German). Retrieved 2019-12-03.
- Changes in ISO 3166-1 (annotated summary of RIPE documents)
- "Toplevel-Domain DDR?". Newsgroup: de.admin.misc. 1998-07-21. Usenet: [email protected]. Retrieved 2012-06-12. discussion on Usenet (German)
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