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'''.arpa''' stands for '''Address and Routing Parameter Area.''' It is one of the original top level domain names ([[TLD]]s) delegated in the [[Root Zone|root zone]] of the Domain Name System ([[DNS]]) of the internet. It is classified as infrastructure top-level domain name and it is exclusively used to support operationally-critical infrastructural identifier spaces. The Internet Architecture Board ([[IAB]]) and Internet Corporation for Assigned Names and Numbers ([[ICANN]]) collaborate in managing the .arpa TLD. The Internet Assigned Numbers Authority ([[IANA]]) is in-charge in the operational administration of the TLD with the cooperation of the technical community. Technical guidelines are provided by IAB.<ref>[http://tools.ietf.org/html/rfc3172 RFC 3172]</ref> <ref>[http://www.iana.org/domains/arpa .ARPA Zone Database Management]</ref>
'''.arpa''' stands for '''Address and Routing Parameter Area.''' It is one of the original [[TLD|top level domain names]] (TLDs) delegated in the [[Root Zone|root zone]] of the [[DNS|Domain Name System]] (DNS) of the Internet. It is classified as an infrastructure top-level domain name and it is exclusively used to support operationally-critical infrastructural identifier spaces. The [[IAB|Internet Architecture Board]] (IAB) and [[ICANN]] jointly manage the .arpa TLD. The [[IANA|Internet Assigned Numbers Authority]] (IANA) is in-charge of the operational administration of the TLD with the cooperation of the technical community. Technical guidelines are provided by the IAB.<ref>[http://tools.ietf.org/html/rfc3172 RFC 3172]</ref> <ref>[http://www.iana.org/domains/arpa .ARPA Zone Database Management]</ref>


Originally, .arpa was established as a temporary domain that will serve as a transition mechanism for a set of host names in the [[ARPANET]] that were administered by [[DARPA]]. The host names will be phased out after a replacement domain name has been created under the categorized TLDs which include [[.com]], [[.edu]], [[.mil]], [[.net]], [[.gov]] and [[.org]].<ref>[http://tools.ietf.org/rfc/rfc920.txt RFC 920]</ref> Although the initial plan for .arpa is to purge everything after the transition, the sub-domain in-addr.arpa remained active and it has been utilized for reverse DNS query of Internet Protocol addresses. <ref>[http://tools.ietf.org/html/rfc3172#appendix-A RFC 3172]</ref>
Originally, .arpa was established as a temporary domain to serve as a transition mechanism for a set of host names in the [[ARPANET]] that were administered by [[DARPA]]. The host names were to be phased out after a replacement was created under the categorized TLDs which include [[.com]], [[.edu]], [[.mil]], [[.net]], [[.gov]] and [[.org]].<ref>[http://tools.ietf.org/rfc/rfc920.txt RFC 920]</ref> Although the initial plan for .arpa was to purge everything after the transition, the sub-domain in-addr.arpa remained active and it has been utilized for reverse [[DNS]] queries of [[IP Address|Internet Protocol addresses]].<ref>[http://tools.ietf.org/html/rfc3172#appendix-A RFC 3172]</ref>


In 2000, the IAB informed the technical community that the .arpa has been re-designated as Address and Routing Parameter Area. The .arpa will serve as a single domain where all new infrastructure sub-domains will be placed to maintain the stability of the internet. The IAB also recommended to the Internet Engineering Steering Group ([[IESG]]) that no new infrastructure domains should be added to [[.int]] and protocols requiring specific domain roots should be rooted elsewhere, new infrastructure domains from the Internet Engineering Task Force ([[IETF]]) protocols must be allocated to the .arpa TLD. Management will be handled by IANA. In addition. the IAB also suggested the review of all existing IETF infrastructures allocated under .int if the costs of transferring them is greater than the risk of staying in place. The IAB believed that allocating the [[IPv6]] reverse mapping domain is more significant and beneficial. <ref>[http://www.iab.org/documents/correspondence-reports-documents/docs2000/iab-statement-on-infrastructure-domain-and-subdomains-may-2000/ IAB Statement on Infrastructure Domain and Subdomains, May 2000]</ref>
In 2000, the IAB informed the technical community that .arpa had been re-designated as an Address and Routing Parameter Area. .arpa is to serve as a domain space where all new infrastructure sub-domains will be placed to maintain the stability of the internet. The IAB also recommended to the [[IESG|Internet Engineering Steering Group]] (IESG) that no new infrastructure domains were to be added to [[.int]], that protocols requiring specific domain roots should be rooted elsewhere, and that new infrastructure domains from the [[IETF|Internet Engineering Task Force]] (IETF) protocols must be allocated to the .arpa TLD. Management is to be handled by IANA. In addition. the IAB also suggested the review of all existing IETF infrastructures allocated under .int, and if the costs of transferring them is greater than the risk of staying in place. <ref>[http://www.iab.org/documents/correspondence-reports-documents/docs2000/iab-statement-on-infrastructure-domain-and-subdomains-may-2000/ IAB Statement on Infrastructure Domain and Subdomains, May 2000]</ref>


==Uses for .arpa==
==Uses for .arpa==
IANA enumerated the following uses for .arpa domain, which include:<ref>
IANA has allowed the following sub-domains on .arpa:<ref>
[http://www.iana.org/domains/arpa ARPA Zone Management]</ref>
[http://www.iana.org/domains/arpa ARPA Zone Management]</ref>
* E164.ARPA -  mapping E.164 numbers to Internet URIs  
* E164.ARPA -  mapping E.164 numbers to Internet URIs  
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* IP6.ARPA- mapping IPv6 addresses to Internet domain names
* IP6.ARPA- mapping IPv6 addresses to Internet domain names
* IRIS.ARPA- locating Internet Registry Information Services
* IRIS.ARPA- locating Internet Registry Information Services
* URI.ARPA- resolving Uniform Resource Identifiers ([[URI]]) according to the Dynamic Delegation Discovery System
* URI.ARPA- resolving [[URI|Uniform Resource Identifiers]] (URI) according to the Dynamic Delegation Discovery System
* URN.ARPA- resolving Uniform Resource Names  ([[URN]]) according to the Dynamic Delegation Discovery System
* URN.ARPA- resolving [[URN|Uniform Resource Names]] (URN) according to the Dynamic Delegation Discovery System


==References==
==References==
{{reflist}}
{{reflist}}
[[Category:TLD]]




Revision as of 16:54, 14 September 2012

Manager: IANA
Registry Provider: .ARPA Registry
Date Implemented: 1985
Type: TLD
Community TLD: for Internet-infrastructure purposes only
More information:

.arpa stands for Address and Routing Parameter Area. It is one of the original top level domain names (TLDs) delegated in the root zone of the Domain Name System (DNS) of the Internet. It is classified as an infrastructure top-level domain name and it is exclusively used to support operationally-critical infrastructural identifier spaces. The Internet Architecture Board (IAB) and ICANN jointly manage the .arpa TLD. The Internet Assigned Numbers Authority (IANA) is in-charge of the operational administration of the TLD with the cooperation of the technical community. Technical guidelines are provided by the IAB.[1] [2]

Originally, .arpa was established as a temporary domain to serve as a transition mechanism for a set of host names in the ARPANET that were administered by DARPA. The host names were to be phased out after a replacement was created under the categorized TLDs which include .com, .edu, .mil, .net, .gov and .org.[3] Although the initial plan for .arpa was to purge everything after the transition, the sub-domain in-addr.arpa remained active and it has been utilized for reverse DNS queries of Internet Protocol addresses.[4]

In 2000, the IAB informed the technical community that .arpa had been re-designated as an Address and Routing Parameter Area. .arpa is to serve as a domain space where all new infrastructure sub-domains will be placed to maintain the stability of the internet. The IAB also recommended to the Internet Engineering Steering Group (IESG) that no new infrastructure domains were to be added to .int, that protocols requiring specific domain roots should be rooted elsewhere, and that new infrastructure domains from the Internet Engineering Task Force (IETF) protocols must be allocated to the .arpa TLD. Management is to be handled by IANA. In addition. the IAB also suggested the review of all existing IETF infrastructures allocated under .int, and if the costs of transferring them is greater than the risk of staying in place. [5]

Uses for .arpa edit

IANA has allowed the following sub-domains on .arpa:[6]

  • E164.ARPA - mapping E.164 numbers to Internet URIs
  • IN-ADDR-SERVERS.ARPA- hosting authoritative name servers for the in-addr.arpa domain
  • IN-ADDR.ARPA- mapping IPv4 addresses to Internet domain names
  • IP6-SERVERS.ARPA- hosting authoritative name servers for the ip6.arpa domain
  • IP6.ARPA- mapping IPv6 addresses to Internet domain names
  • IRIS.ARPA- locating Internet Registry Information Services
  • URI.ARPA- resolving Uniform Resource Identifiers (URI) according to the Dynamic Delegation Discovery System
  • URN.ARPA- resolving Uniform Resource Names (URN) according to the Dynamic Delegation Discovery System

References edit

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