In June 1998, Postel raised the possibility of covering IANA operating costs by charging locality name registrars, who would pass the costs along to individual registrants. In July 1997, Postel instituted a "50/500 rule" that limited each delegated manager to 500 localities maximum, 50 in a given state. us to various public and private registrants could register with the delegated manager for the specific zone they wished to register in, but not directly with the. From June 1993 to June 1997, Postel delegated the vast majority of the geographic subdomains under. Registrants could only register third-level domains or higher in a geographic and organizational hierarchy. us ccTLD's policies in December 1992 as RFC 1386 and revised them the following June in RFC 1480. Postel and his colleague Ann Westine Cooper codified the. us and the gTLD contract with the National Science Foundation). us and the gTLD contract with the United States Department of Defense) and later Network Solutions (which held the. us under a subcontract that the ISI and USC had from SRI International (which held the. Its original administrator was Jon Postel of the Information Sciences Institute (ISI) at the University of Southern California (USC). us was created as the Internet's first ccTLD. 5.2 New generic top-level domains for areas in the United States.
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5.1 Country code top-level domains (ccTLDs) for territories of the United States.5 Other top-level domains related to the United States.us, which has primarily been used by state and local governments, even though private entities may also register. citizens, residents, or organizations, or a foreign entity with a presence in the United States. us is the Internet country code top-level domain (ccTLD) for the United States. nexus requirement can be enforced by challenge but seldom isĢnd-level registrations allowed originally only 3rd- or 4th-level registrations in a complex hierarchy Some American businesses as alternative to.state and local governments (declining in favor of.