ITU Operational Bulletin
www.itu.int/itu-t/bulletin

No. 1336

15.III.2026

(Information received by 27 February 2026)   ISSN 1564-5223 (Online)

Place des Nations CH-1211
Genčve 20 (Switzerland)
Tel:            +4
1 22 730 5111

E-mail:       itumail@itu.int

Standardization Bureau (TSB)
Tel:            +41 22 730 5211
Fax:            +41 22 730 5853
E-mail:       tsbmail@itu.int /
tsbtson@itu.int

Radiocommunication Bureau (BR)
Tel:            +41 22 730 5560
Fax:            +41 22 730 5785
E-mail:      
brmail@itu.int

 


Table of Contents

GENERAL  INFORMATION

Lists annexed to the ITU Operational Bulletin: Note from TSB.... 3

Approval and deletion of ITU-T Recommendations

The International Public Telecommunication Numbering Plan: Note from TSB

International Identification Plan for Public Networks and Subscriptions: Note from TSB

Telephone Service:

Azerbaijan (Ministry of Digital Development and Transport, Baku)

Guyana (Telecommunications Agency, Georgetown)

Service Restrictions.. 18

Call-Back and alternative calling procedures (Res. 21 Rev. PP-06).. 18

AMENDMENTS  TO  SERVICE  PUBLICATIONS

List of Recommendation ITU-T E.164 assigned Country Codes

Mobile Network Codes (MNC) for the international identification plan for public networks
and subscriptions..
20

List of ITU Carrier Codes

List of International Signalling Point Codes (ISPC).. 22

National Numbering Plan.... 22