.arpa

Internet top-level domain June 2020 March 2021 .arpa 1985 1 1 Infrastructure domain Active IANA Internet Architecture Board A temporary TLD to facilitate the transition from ARPANET to the DNS. Internet infrastructure such as reverse DNS lookup. No domain registrations possible, new subdomains rarely added Second-level domains used for various functions related to Internet infrastructure as defined by RFCs. 3172; 9120 None IANA .arpa info Yes The domain name arpa is a top-level domain (TLD) in the Domain Name System (DNS) of the Internet. It is used predominantly for the management of technical network infrastructure. Prominent among such functions are the subdomains in-addr.arpa and ip6.arpa, which provide namespaces for reverse DNS lookup of IPv4 and IPv6 addresses, respectively. The name originally was the acronym for the Advanced Research Projects Agency (ARPA), the funding organization in the United States that developed the ARPANET, the precursor of the Internet. It was the first domain defined for the network in preparation for a hierarchical naming system for the delegation of authority, autonomy, and responsibility. It was originally intended only to serve in a temporary function for facilitating the systematic naming of the ARPANET computers. However, it became practically difficult to remove the domain after infrastructural uses had been sanctioned. As a result, the name was redefined as the backronym Address and Routing Parameter Area. Domain-name registrations in arpa are not possible, and new subdomains are infrequently added by the Internet Engineering Task Force. Purpose Each computer using the Internet Protocol is identified by a numerical IP address for identification and location addressing.791 Each host is also assigned a more memorable hostname, which often relates to the purpose or ownership of the host, and is used more conveniently in user interaction with network functions, such as when connecting to or accessing a resource. Originally, the mapping between names and addresses was a cumbersome mechanical process using lookup tables distributed as computer files between network administrators. The Domain Name System (DNS) solved this inefficiency by automating the lookup function with a hierarchical naming system using domain names. When a user requests a network service using a domain name, the protocol implementation (protocol stack) translates the name to an address that can be used to reach a remote host. This naming function, often called forward resolution, was the original purpose of the top-level domain "ARPA". It was the first domain defined in the first naming system of the nascent Internet,881 and was supposed to be an initial container domain for all then-existing ARPANET hosts. The next stage of development of the naming architecture foresaw the establishment of specific domains for other purposes based on certain requirements. Reverse IP address mapping In many applications the reverse of the name-to-address mapping is also required. The host receiving a service request may require the domain name of the originating computer, for example, to customize the service, or for verification purposes. This latter function, called Reverse DNS lookup, is implemented in the major uses of the domain arpa: its subdomains in-addr.arpa for Internet Protocol version 4, and ip6.arpa for IPv6. Conceptually similar lookup and mapping functionality is provided by other subdomains of arpa for specific types of data. Telephone number mapping The domain e164.arpa provides a lookup function that retrieves information associated with telephone numbers through the ENUM service. This service may be used to obtain the name of a computer that is capable of routing telecommunication requests for a registered telephone number, or obtain an email address to contact the subscriber of a specific telephone number. Residential networking The domain name home.arpa was reserved by the Internet Engineering task force in May 2018 as a special-use domain name for non-unique DNS services in residential networking, to avoid the use of the top-level domain home., which would require DNSSEC signatures.8375 In addition, the use of home. led to domain name leakage to the Internet root name servers. The authoritative name servers for home.arpa are the AS112 blackhole servers,https://datatracker.ietf.org/doc/html/rfc8375.html Special-Use Domain 'home.arpa.' Pfister Pierre Lemon Ted May 2018 Internet Engineering Task Force RFC 8375 which prevent leaked queries for home.arpa from burdening the root servers.https://datatracker.ietf.org/doc/html/rfc6305.html I'm Being Attacked by PRISONER.IANA.ORG! Maton William F. Abley Joe July 2011 Internet Engineering Task Force RFC 6305 History The ARPANET, named for the Advanced Research Projects Agency (ARPA), was launched in 1969, and is considered the earliest predecessor of the Internet. The agency's name was adopted as the name for the first formal name space of the network after it had transitioned to TCP/IP networking in January 1983.881 The name was used as a naming suffix for all then-existing ARPANET hosts. Hierarchical domain-style names were intended to support delegation of responsibility and authority for adding future hosts to the network. With the formal development of such a hierarchical naming system, the domain also became one of the inaugural members of a set of domain names for specific types of network members, namely com for commercial users, org for organizations, edu for educational institutions, gov for government entities, and mil for networks of the United States military.920 It was expected that the use of arpa would be temporary and that the existing systems would be migrated to other domains. But arpa also provided e-mail addresses associated with the Network Information Center, which administered the naming system. After serving the transitional purpose, it proved impractical to remove the domain. The domain in-addr.arpa had been installed for reverse DNS lookup of IP addresses.1035 3.5 Originally, the IETF intended that new infrastructure databases would be created in the top-level domain int. In May 2000, this policy was reversed and it was decided that the top-level domain int should be restricted to use by international organizations.https://www.iab.org/documents/docs/iab-arpa-stmt.txt IAB Statement on Infrastructure Domain and Subdomains 2019-08-01 2003-08-27 https://web.archive.org/web/20030827065632/https://www.iab.org/documents/docs/iab-arpa-stmt.txt dmy-all Arpa was retained for its long-standing purpose, but its full name was changed to the Address and Routing Parameter Area, making the zone name a backronym.3172 7 Further, as indicated by DARPA, the arpa TLD string should be given a different expansion such as "Address and Routing Parameter Area" to avoid any implication that DARPA has operational responsibility for the domain. Registrations of internet infrastructure services in .int made prior to this policy change, were optionally grandfathered in and not required to move to .arpa. In March 2010, zone arpa was secured with digital signatures within the Domain Name System Security Extensions (DNSSEC).http://dnssec-deployment.org/pipermail/dnssec-deployment/2010-March/003730.html https://web.archive.org/web/20100328000016/http://dnssec-deployment.org/pipermail/dnssec-deployment/2010-March/003730.html dead 2010-03-28 [Dnssec-deployment] Signing of the ARPA zone Subdomains Subdomains of arpa are created by resolution in the work groups of the Internet Engineering Task Force via the Request for Comments process, and are maintained by the Internet Assigned Numbers Authority (IANA). The DNS zone arpa has the following subdomains:.arpa https://icannwiki.org/arpa ICANN 2020-06-17 January 7, 2009 https://web.archive.org/web/20090107041018/http://icannwiki.org/ARPA dead.ARPA Zone Management https://www.iana.org/domains/arpa Internet Assigned Numbers Authority (IANA) 2023-03-02 May 9, 2008 https://web.archive.org/web/20080509090149/https://www.iana.org/domains/arpa live Domain Purpose Authority document (RFC) 6tisch.arpa For IPv6 over the Time Slotted Channel Hopping mode of IEEE 802.15.4 9031 no yes as112.arpa Sinking of DNS traffic for reverse IP address resolutions, misc. (see Blackhole server) 7535 no yes e164.arpa Mapping of E.164 numbers to Internet URIs 6116 no yes eap-noob.arpa For the Nimble Out-Of-Band authentication method of the Extensible Authentication Protocol framework 9140 no yes home.arpa Residential networking 8375 no yes in-addr.arpa Mapping of IPv4 addresses to domain names 1035 no yes ip6.arpa Mapping of IPv6 addresses to domain names 3152 no yes in-addr-servers.arpa Domains for authoritative DNS servers for the reverse lookup domains 5855 no yes ip6-servers.arpa ipv4only.arpa Detection of DNS64 availability and NAT64 prefix 7050 no yes iris.arpa Locating Internet registry information services 4698 no yes ns.arpa Domain for hosting authoritative DNS servers for the .arpa domain 9120 no yes resolver.arpa Domain for discovery of designated DNS resolvers 9462 no yes service.arpa For DNS-based service discovery over unicast 9665 no yes uri.arpa Resolution of URIs and URNs,according to the Dynamic Delegation Discovery System 3405 no yes urn.arpa References (987) External links arpa. zone file Category:Generic top-level domains Category:Internet properties established in 1985 Category:1985 establishments in the United States