digplanet beta 1: Athena
Share digplanet:

Agriculture

Applied sciences

Arts

Belief

Business

Chronology

Culture

Education

Environment

Geography

Health

History

Humanities

Language

Law

Life

Mathematics

Nature

People

Politics

Science

Society

Technology

E.164 is an ITU-T recommendation, titled The international public telecommunication numbering plan, that defines a numbering plan for the world-wide public switched telephone network (PSTN) and some other data networks.

E.164 defines a general format for international telephone numbers. Plan-conforming numbers are limited to a maximum of 15 digits.[1] The presentation of numbers is usually prefixed with the character + (plus sign), indicating that the number includes the international country calling code (country code), and must typically be prefixed when dialing with the appropriate international call prefix, which is a trunk code to reach an international circuit from within the country of call origination.

The title of the original version and first revision of the E.164 standard was "Numbering Plan for the ISDN Era".

Telephone number categories[edit]

This recommendation provides the number structure and functionality for the three categories of telephone numbers used for international public telecommunication:

For each of the categories, it details the components of the numbering structure and the digit analysis required to successfully route the calls. Annex A provides additional information on the structure and function of E.164 numbers. Annex B provides information on network identification, service parameters, calling/connected line identity, dialing procedures, and addressing for Geographic-based ISDN calls. Specific E.164-based applications which differ in usage are defined in separate recommendations.

The number categories are all based on a fifteen-digit numbering space. Before 1997, only twelve digits were allowed. The definition does not include any trunk dialing codes, necessary for a call to reach international circuits from inside the country of call origination.

Number structure for geographic area[edit]

Country Code National Destination Code (optional) Subscriber Number
National (significant)
cc = 1 to 3 digits maximum = 15 − cc = 12 to 14 digits
International public telecommunication number for geographic areas (maximum 15 digits)

Number structure for global services[edit]

Country Code Global Subscriber Number
cc = 3 digits maximum = 15 − cc = 12 digits
International public telecommunication number for global services (maximum 15 digits)

Number structure for networks[edit]

Country Code Identification Code Subscriber Number
cc = 3 digits x = 1 to 4 digits maximum = 15 − (cc + x) = 8 to 11 digits
International public telecommunication number for networks (maximum 15 digits)

Number structure for groups of countries[edit]

Country Code Group Identification Code Subscriber Number
cc = 3 digits gic = 1 digit maximum = 15 − (cc + gic) = 11 digits
International public telecommunication number for groups of countries (maximum 15 digits)

Recommendations[edit]

E.164.1[edit]

This recommendation describes the procedures and criteria for the reservation, assignment, and reclamation of E.164 country codes and associated identification code (IC) assignments. The criteria and procedures are provided as a basis for the effective and efficient utilization of the available E.164 numbering resources. Such assignments require a collaborative effort between the ITU-TSB and the appropriate ITU-T study group to endeavor to ensure that the assignments meet the needs of the telecommunication community. The development of these criteria and procedures are in accordance with the principles contained in E.190 and the numbering plan formats detailed in E.164.

E.164.2[edit]

This recommendation contains the criteria and procedures for an applicant to be temporarily assigned a three-digit identification code within the shared E.164 country code 991 for the purpose of conducting an international non-commercial trial.

E.164.3[edit]

This recommendation describes the principles, criteria, and procedures for the assignment and reclamation of resources within a shared E.164 country code for groups of countries. These shared country codes will coexist with all other E.164-based country codes assigned by the ITU. The resource of the shared country code consists of a country code and a group identification code (CC + GIC) and provides the capability for a group of countries to provide telecommunication services within the group. The TSB is responsible for the assignment of the CC + GIC.

E.163[edit]

E.163 was the former ITU-T recommendation for describing telephone numbers for the public switched telephone network (PSTN). In the United States, this was formerly referred to as a directory number. E.163 was withdrawn, and some recommendations were incorporated into revision 1 of E.164 in 1997.

DNS mapping of E.164 numbers[edit]

Some national telephone bodies or telephone companies have implemented an Internet-based database for their numbering spaces. E.164 numbers may be used in the Domain Name System (DNS) of the Internet in which the second-level domain e164.arpa has been reserved for telephone number mapping (ENUM). In the system, any phone number may be mapped into a domain name using a reverse sequence of subdomains for each digit. For example, the telephone number +19995550123 translates to the domain name 3.2.1.0.5.5.5.9.9.9.1.e164.arpa.[2]

When a number is mapped, a DNS query may be used to locate the service facilities on the Internet that accept and process telephone calls to the owner of record of the number, using, for example, the Session Initiation Protocol (SIP), a call-signaling VoIP protocol whose SIP addresses are similar in format (user@domain...) to e-mail addresses.

This allows a direct, end-to-end Internet connection without passing to the public switched telephone network (and back) and without incurring PSTN tolls.

As this is effectively a free call, there is little incentive for carriers to promote e164 DNS service. The e164.arpa domain is in production status as of 2013 only in a few European nations (Austria, Czech Republic, Finland, Germany, Ireland, Lithuania, Poland, Romania, Netherlands, United Kingdom).[3] Australia conducted a trial in 2007, but then abandoned further support of.1.6.e164.arpa.[4] Many nations have no .e164.arpa implementation active.[5]

The Internet Telephony Users Association runs e164.org as an alternate server, which relies on users submitting their own PSTN numbers and corresponding URIs for verification.[6] A VoIP PBX, such as Asterisk, may be configured to resolve numbers in both databases, sending only those not listed with a free Internet routing over the PSTN.

See also[edit]

References[edit]

  1. ^ ITU; ITU-T. "The International Public Telecommunication Numbering Plan". ITU. p. 11. Retrieved 21 March 2014. 
  2. ^ "ENUM —Mapping the E.164 Number Space into the DNS". The Internet Protocol Journal - Volume 5, Number 2. Cisco Systems. Retrieved 2013-10-26. 
  3. ^ "RIPE ENUM Working Group: Progress Matrix". Enumdata.org. Retrieved 2013-10-26. 
  4. ^ "ENUM trial". enum.com.au. Retrieved 2013-10-26. 
  5. ^ Russell Bryant, Leif Madsen, Jim Van Meggelen. Asterisk: The Definitive Guide. Retrieved 2013-10-26. 
  6. ^ Joshua Brashars (2007-08-13). Asterisk Hacking. Retrieved 2013-10-26. 

External links[edit]


Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/E.164 — Please support Wikipedia.
This page uses Creative Commons Licensed content from Wikipedia. A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia.
1000000 videos foundNext > 

Provet TV: May 19th, 2014 E.164

Kasey and Flora give you the latest update on campus news.

Formatura da RIA 163 e 164

felipe e 164

девчаты e 164

Bibla, fjalë e Zotit apo e njeriut ? ( pjesa e 164 ) Cilët ishin vizitorët e parë ? 2

Kontradikta numer 164.

Educação Brasileira 164 - Ilan Brenman e Maria José Salatino de Assis

a importância da literatura infantil no desenvolvimento das crianças desde bebês foi discutido pelo escritor Ilan Brenman e pela psicopedagoga Maria José Sal...

Beach Detecting With Deep Digger Daughter & E Trac (164)

So it's time to unwrap the E Trac and see what it can do on the beach. Deep Digger Dan Shop: http://deepdiggerdanshop.com Facebook: https://www.facebook.com/...

Somos todos macacos e Luciano Huck (oportunista) - Brasil em Foco 164

http://liberdadexpressaoecomunicacao.blogspot.com.br/2014/04/os-bananas-e-o-coxinha.html?spref=fb.

Homes for sale - 164 E delaware Parkway, Villas, NJ 08251

Property Site: http://tour.circlepix.com/home/LEGDEF Residential corner property 50 x 100 located in nice neighborhood. Property is clear and ready to build. City water and sewer are available...

LIVESTREAM #164 Minecraft Com Inscritos

MINECRAFT COM INSCRITOS !LIVESTREAM ! SIGA DAR O TEU LIKE E CURTIR DA LIVE :D 1º VÍDEO DE HOJE : https://www.youtube.com/watch?v=-tlpbxqetBw 2º VÍDEO DE HOJE : https://www.youtube.com/watch?v=...

1000000 videos foundNext > 

1083 news items

 
Windows IT Pro
Wed, 03 Sep 2014 08:40:23 -0700

The normalization rule specifies how to translate the phone number to the E.164 international numbering plan. Gateway. A gateway is a media termination device used to connect to Lync Server 2013. Trunk. The trunk is the Mediation server and gateway.
 
La Stampa
Mon, 15 Sep 2014 07:26:15 -0700

L'avvincente gara della MotoGp di San Marino è stata l'avvenimento più visto della domenica sportiva televisiva: in chiaro sono stati 1 milione e 948 mila gli appassionati sintonizzati sul canale 26 di Cielo, con picchi di 2 milioni e 164 mila per gli ...

CN24TV

CN24TV
Mon, 15 Sep 2014 03:32:23 -0700

Attraverso 76 presentazioni, 116 presentazioni orali e 164 presentazioni di poster da parte di scienziati di tutto il mondo, i partecipanti al Congresso cercheranno di identificare i limiti delle tecnologie esistenti per il trattamento di gravi carenze ...
 
La Citta di Salerno
Thu, 11 Sep 2014 18:18:45 -0700

Sei capitoli e 164 pagine. A fronte una foto dell'autore, rielaborata dalla graphic designer Laura Palmentieri. Un libro autoprodotto, disponibile on line sul sito: www.ilmiolibro.it. Quando è iniziato il suo interesse per l'Africa? “Sin da ragazzino ...
 
Diario Hoy (Argentina)
Tue, 09 Sep 2014 05:23:52 -0700

Mediante las redes sociales comenzaron a circular imagenes de Berisso con las calles anegadas. En la galería de fotos se puede ver claramente cóno se encontraban las calles 18 e/ 164 y 165 cerca de las 8 de la mañana. Accesos a Capital anegados, ...
 
La Stampa
Mon, 08 Sep 2014 07:26:15 -0700

Considerevole la differenza rispetto allo scorso anno, quando il Gran Premio era stato visto da 7 milioni e 164 mila appassionati sulla Rai e un milione e 42 persone sulla rete satellitare. Sempre a proposito di motori, buon riscontro per la Superbike ...
 
China Radio International
Fri, 12 Sep 2014 07:03:45 -0700

Sabe-se normalmente que os mamíferos têm origem no período Jurássico Médio, entre 174 e 164 milhões de anos atrás. Os fósseis recém-descobertos remontam a 160 milhões de anos atrás, o que implica que os mamíferos poderiam aparecer no período ...
 
CN24TV
Thu, 11 Sep 2014 00:05:28 -0700

Attraverso 76 presentazioni, 116 presentazioni orali e 164 presentazioni di poster da parte di scienziati di tutto il mondo, i partecipanti al Congresso cercheranno di identificare i limiti delle tecnologie esistenti per il trattamento di gravi carenze ...
Loading

Oops, we seem to be having trouble contacting Twitter

Talk About E.164

You can talk about E.164 with people all over the world in our discussions.

Support Wikipedia

A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia. Please add your support for Wikipedia!