E.123
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E.123 is an international standard by the standardization union (ITU-T), entitled Notation for national and international telephone numbers, e-mail addresses and web addresses.[1] It provides guidelines for the presentation of telephone numbers, email addresses, and web addresses in print, on letterheads, and similar purposes.
Quick Facts Status, Latest version ...
Notation for national and international telephone numbers, e-mail addresses and web addresses | |
Status | In force |
---|---|
Latest version | (02/01) February 2001 |
Organization | ITU-T |
Related standards | E.163, E.164 |
Domain | telephony |
License | Freely available |
Website | https://www.itu.int/rec/T-REC-E.123 |
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As described by the ITU, in E.123: "+" is the "International Prefix Symbol" used in a "Telephone number, E.123 international notation".