.eu is the two-letter alpha code country code top-level domain name (ccTLD) of the European Union. It's introduced and implemented in 1999.
The European ccTLD is managed and operated by EURid, a non-profit organization founded by three registry operators: namely DNS Belgium, Istituto di Informatica e Telematica and Stiftelsen för Internetinfrastruktur (IIS), under the authority of the European Commission.
Only persons, organizations, and businesses based in the European Union can register a .eu domain name.
EURid implemented a four-month Sunrise Period for the .eu ccTLD on a first-come, first-serve basis. The first registration phase, which began on 7 December 2005 was to facilitate applications by registrants with prior rights on potential domain names. The second phase of the sunrise period began on 7 February 2006 and it was for company, trade, and personal names. The registry reached 245,000 domain name registrations with sunrise applications
The registry opened the .eu ccTLD for public registration (landrush period). In June 2006 .eu registrations reached around 3 million.
.eu ranks #14 among all domain extensions, and #7 among all country-code extensions (ccTLDs). Currently, there are 3.3M registered .eu domain names. EURid is the current registry of .eu extension.