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It is a successor to the WHOIS protocol, used to look up relevant registration data from such Internet resources as domain names, IP addresses, and autonomous system numbers. While WHOIS essentially retrieves free text, RDAP delivers data in a standard, machine-readable JSON format. [1]
Lookups of IP address allocations are often limited to the larger Classless Inter-Domain Routing (CIDR) blocks (e.g., /24, /22, /16), because usually only the regional Internet registries (RIRs) and domain registrars run RWhois or WHOIS servers, although RWhois is intended to be run by even smaller local Internet registries, to provide more ...
[1] Domain names are managed under a hierarchy headed by the Internet Assigned Numbers Authority (IANA), which manages the top of the DNS tree by administrating the data in the root nameservers . IANA also operates the int registry for intergovernmental organizations, the arpa zone for protocol administration purposes, and other critical zones ...
Dot-separated fully qualified domain names are the primarily used form for human-readable representations of a domain name. Dot-separated domain names are not used in the internal representation of labels in a DNS message [7] but are used to reference domains in some TXT records and can appear in resolver configurations, system hosts files, and URLs.
If the whois information had been out of date and is now updated, the end-user should wait 12–24 hours before proceeding further, to allow time for the updated data to propagate. The end user contacts the new registrar with the wish to transfer the domain name to their service, and supplies the authentication code.
WHOIS++ was devised as an extension to the pre-existing WHOIS system. [2] WHOIS was an early networked directory service, originally maintained by SRI International for the Defense Data Network . The WHOIS protocol is still widely used to allow domain ownership records in the Internet to be easily queried.
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.
2,002,412 (2022-12-16) [1] Registration restrictions: ... The .es domain does not have a conventional WHOIS server operating on port 43, ...