E.123
Sign in to saveAlso known as Notation for national and international telephone numbers, e-mail addresses and Web addresses
E.123 is an international standard by the Telecommunication Standardization Sector of the International Telecommunication Union (ITU-T), entitled Notation for national and international telephone numbers, e-mail addresses and Web addresses. It provides guidelines for the presentation of telephone numbers, email addresses, and web addresses in print, on letterheads, and similar purposes.
~5 min read
Encyclopedic overview
7 sectionsContents
- Example formats
- Telephone number
- Microsoft telephone number format
- Emergency contact information
- See also
- References
- External links
E.123 is an international standard by the Telecommunication Standardization Sector of the International Telecommunication Union (ITU-T), entitled Notation for national and international telephone numbers, e-mail addresses and Web addresses. It provides guidelines for the presentation of telephone numbers, email addresses, and web addresses in print, on letterheads, and similar purposes.
As described by the standard, ⟨+⟩ is the international prefix symbol, should precede the country code, and serves to identify the number following as the international telephone number.
Excerpted from Wikipedia’s “E.123” article, available under the CC BY-SA 4.0 licence.