ITU Operational Bulletin www.itu.int/itu-t/bulletin
No. 1346	15.VIII.2026	(Information received by 31 July 2026)   ISSN 1564-5223 (Online)
Place des Nations CH-1211 Genève 20 (Switzerland) Tel:            +41 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

Telephone Service:

Guyana (Telecommunications Agency, Georgetown)

Saudi Arabia (Communications, Space and Technology Commission (CST), Riyadh)

List of Ship Stations and Maritime Mobile Service Identity Assignments (List V)

Service Restrictions. . 14

Call-Back and alternative calling procedures (Res. 21 Rev. PP-06).. 14

AMENDMENTS  TO  SERVICE  PUBLICATIONS

List of Issuer Identifier Numbers

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

List of ITU Carrier Codes

List of International Signalling Point Codes (ISPC)

National Numbering Plan.... 17