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ITU-T E.164 (11/2010)

The international public telecommunication numbering plan

Recommendation ITU-T E.164 provides the number structure and functionality for the five categories of numbers used for international public telecommunication: geographic areas, global services, Networks, groups of countries (GoC) and resources for trials. 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 international public telecommunication numbers (hereafter referred to as "international ITU-T E.164-numbers"). Annex B provides information on network identification, service parameters, calling/connected line identity, dialling procedures and addressing for geographic-based ISDN calls. Specific ITU-T E.164-based applications, which differ in usage, are defined in separate ITU-T Recommendations.

Citation:	http://handle.itu.int/11.1002/1000/10688
Approval date:	2010-11-18
Approval process:	TAP
Status:	In force
Maintenance responsibility:	ITU-T Study Group 2
Further details:	Patent statement(s) Development history

EditionsRelated supplement(s)

Ed.	ITU-T Recommendation	Status	Summary	Table of Contents	Download
6.1	E.164 (2010) Amd. 1 (06/2011)	In force	here	-	here
6	E.164 (11/2010)	In force	here	here	here
5	E.164 (02/2005)	Superseded	here	here	here
4	E.164 (05/1997)	Superseded	here	here	here
3	E.164/I.331 (08/1991)	Superseded	-	here	here
2	E.164/I.331/Q.11 bis (11/1988)	Superseded	-	here	here
1	E.164/I.331 (10/1984)	Superseded	-	-	Not available


ITU-T Supplement	Title	Status	Summary	Table of contents	Download
E.164 Suppl. 1 (03/1998)	Alternatives for carrier selection and network identification	In force	-	here	here
E.164 Suppl. 2 (06/2014)	Number portability	In force	here	here	here
E.164 Suppl. 3 (05/2004)	Operational and administrative issues associated with national implementations of the ENUM functions	In force	here	here	here
E.164 Suppl. 3 (2004) Amd. 1 (11/2009)	-	In force	here	-	here
E.164 Suppl. 4 (05/2004)	Operational and administrative issues associated with the implementation of ENUM for non-geographic country codes	In force	here	here	here
E.164 Suppl. 4 (2004) Amd. 1 (11/2009)	-	In force	here	-	here
E.164 Suppl. 5 (11/2009)	Guidance with regard to the selection of numbers for helplines for children	In force	here	here	here
E.164 Suppl. 6 (03/2012)	Guidelines for identifying and selecting globally harmonized numbers	In force	here	here	here
E.164 Suppl. 2 (11/1998)	Number Portability	Superseded	-	here	here
E.164 Suppl. 3 (05/2002)	Operational and administrative issues associated with national implementations of the ENUM functions	Superseded	here	here	here
E.164 Suppl. 4 (05/2003)	Operational and administrative issues associated with the implementation of ENUM for non-geographic country codes	Superseded	here	here	here
E.164 Suppl. 2 (11/2009)	Number portability	Superseded	here	here	here
E.164 Suppl. 2 (03/2012)	Number portability	Superseded	here	here	here
E.164 Suppl. 5 (05/2008)	Guidance with regard to the selection of numbers for helplines for children	Superseded	here	here	here
E Suppl. 3 (12/1972)	Special service observation data	Superseded	-	-	Not available
E Suppl.4 (10/1976)	Various tones used in national networks	Superseded	-	-	Not available
E Suppl.10 (10/1976)	List of possible supplementary telephone services liable to be put at the disposal of subscribers	Superseded	-	-	Not available
E Suppl.5 (10/1976)	North american precise audible tone plan	Superseded	-	-	Not available
E Suppl.6 (10/1976)	Treatment of calls considered as “terminating abnormally”	Superseded	-	-	Not available
E Suppl.9 (10/1976)	An experimental test design for the determination of inexperienced user difficulties in setting up international calls using nationally available instructions	Superseded	-	-	Not available
E Suppl.8 (10/1976)	Use of computers for network planning and circuit group dimensioning	Superseded	-	-	Not available
E Suppl.1 (12/1972)	Table of the Erlang formula	Superseded	-	-	Not available
E Suppl.1 (10/1976)	Table of the Erlang loss formula	Superseded	-	-	Not available
E Suppl.2 (12/1972)	Curves showing the relation between the traffic offered and the number of circuits required	Superseded	-	-	Not available
E Suppl.2 (10/1976)	Curves showing the relation between the traffic offered and the number of circuits required	Superseded	-	-	Not available
E Suppl.7 (10/1976)	Information on traffic routing in the international network	Superseded	-	-	Not available
E-100 Suppl. 2 (10/1984)	Various tones used in national networks	Superseded	-	-	Not available
E-100 series Suppl. 2 (11/1988)	Various tones used in national networks	Superseded	-	-	Not available
E-100 series Suppl. 2 (01/1994)	Various tones used in national networks	Superseded	-	-	here
E100-300 Suppl. 3 (10/1984)	North american precise audible tone plan	Superseded	-	-	Not available
E100-300 Suppl. 4 (10/1984)	Treatment of calls considered as “terminating abnormally”	Superseded	-	-	Not available
E100-300 Suppl. 6 (10/1984)	Preparation of information to customers travelling abroad	Superseded	-	-	Not available
E-800 series Suppl. 3 (10/1976)	Information on traffic routing in the international network	Superseded	-	-	Not available

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ITU-T Recommendations

ITU-T E.164 (11/2010)