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This is a list of the oldest extant registered generic top-level domains used in the Domain Name System of the Internet. Until late February 1986, Domain Registration was limited to organizations with access to ARPA. Public registration was revealed on Usenet on February 24, 1986. [1]
Domain name registry. A domain name registry is a database of all domain names and the associated registrant information in the top level domains of the Domain Name System (DNS) of the Internet that enables third party entities to request administrative control of a domain name. Most registries operate on the top-level and second-level of the DNS.
A country code top-level domain ( ccTLD) is an Internet top-level domain generally used or reserved for a country, sovereign state, or dependent territory identified with a country code. All ASCII ccTLD identifiers are two letters long, and all two-letter top-level domains are ccTLDs.
Appearance. This list of Internet top-level domains ( TLD) contains top-level domains, which are those domains in the DNS root zone of the Domain Name System of the Internet. A list of the top-level domains by the Internet Assigned Numbers Authority (IANA) is maintained at the Root Zone Database. [ 1 ] IANA also oversees the approval process ...
The domain name gov is a sponsored top-level domain (sTLD) in the Domain Name System of the Internet. The name is derived from the word government, indicating its restricted use by government entities. The TLD is administered by the Cybersecurity and Infrastructure Security Agency (CISA), [ 1] a component of the United States Department of ...
Registry website. about.us. .us is the Internet country code top-level domain (ccTLD) for the United States. It was established in early 1985. Registrants of .us domains must be U.S. citizens, residents, or organizations – or foreign entities with a presence in the United States or any territory of the United States. [ 2]
A–Z Index of US Departments and Agencies, USA.gov, the US government's official web portal. Directory of agency contact information. CyberCemetery, online document archive of defunct US Federal Agencies, maintained by the University of North Texas Libraries in partnership with the Federal Depository Library Program of the GPO
A Domain Name System blocklist, Domain Name System-based blackhole list, Domain Name System blacklist ( DNSBL) or real-time blackhole list ( RBL) is a service for operation of mail servers to perform a check via a Domain Name System (DNS) query whether a sending host's IP address is blacklisted for email spam. [ 1]
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