Committed to connecting the world


ITU-T Recommendations

Search by number:
Skip Navigation Links
Content search
Advanced search
Provisional name
ISO/IEC number
Formal description
Study Groups tree viewExpand Study Groups tree view

ITU-T E.123 (02/2001)

عربي | 中文 | English | Español | Français | Русский
Notation for national and international telephone numbers, e-mail addresses and web addresses
This Recommendation applies specifically to the printing of national and international telephone numbers, electronic mail addresses and Web addresses on letterheads, business cards, bills, etc. Regard has been given to the printing of existing telephone directories. The standard notation for printing telephone numbers, E-mail addresses and Web addresses helps to reduce difficulties and errors, since this address information must be entered exactly to be effective.
Series title: E series: Overall network operation, telephone service, service operation and human factors
  E.100-E.229: International operation
  E.120-E.139: General provisions concerning users
Approval date: 2001-02-02
Approval process:TAP
Status: In force
Maintenance responsibility: ITU-T Study Group 16
Further details: Patent statement(s)
Development history
Ed. ITU-T Recommendation Status Summary Table of Contents Download
6.1 E.123 (2001) Amd. 1 (05/2008) In force - - here
6.0 E.123 (2001) Err. 1 (05/2008) In force - - here
6 E.123 (02/2001) In force
6.0 E.123 (2001) Err. 2 (06/2022) In force - - here
5 E.123 (11/1988) Superseded - - here
4 E.123 (10/1984) Superseded - - Not available
3 E.123 (11/1980) Superseded - - Not available
2 E.162 (10/1976) Superseded - - Not available
1 E.162 (12/1972) Superseded - - Not available