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ITU-T E.164 Suppl. 2 (06/2020)

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Number portability
Supplement 2 to Recommendation ITU-T E.164 defines standard terminology for a common
understanding of the different aspects of number portability within an ITU-T E.164 numbering
scheme. It identifies numbering and addressing formats, call flows, network architectures and routing
approaches that will provide alternative methods of implementation. It also proposes some examples
of the administrative and operational processes required for the successful implementation of number
portability.
Citation: http://handle.itu.int/11.1002/1000/14311
Approval date: 2020-06-05
Approval process:Agreed
Status: In force
Maintenance responsibility: ITU-T Study Group 2
Further details: Patent statement(s)
Development history
[1 related work items in progress]
Ed. ITU-T Recommendation Status Summary Table of Contents Download
6.7 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5 E.164 (02/2005) Superseded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4 E.164 (05/1997) Superseded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3 E.164/I.331 (08/1991) Superseded -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2 E.164/I.331/Q.11 bis (11/1988) Superseded -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1 E.164/I.331 (10/1984) Superseded - - Not available