'''[[RFC 1591]]''' is one of the foundational documents of the Internet, particularly regarding the delegation of [[ccTLD]]s. It was drafted in 1994 by [[Jon Postel]]. The RFC lays out the core principles of [[IANA]]'s delegation of domains to registries. It identifies the key criteria for reviewing a request for delegation. It also states that the IANA is "not in the business of deciding what is and what is not a country." Postel adopted the ISO-3166-1 list of two-letter country codes as the canonical reference for what is considered a country, "with the knowledge that ISO has a procedure for determining which entities should be and should not be on that list."
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'''[[CARNet|Croatian Academic and Research Network]]''' (CARNet) is the registry operator for the .hr ccTLD for Croatia. Initially a Ministry of Science and Technology project, it was spun off as a separate institution in 1995 by the Croatian government to administer the ccTLD. The University Computing Center of the University of Zagreb provided administrative and technical support to the registry until 2010 when CARNet took over most of the work.