ITU Operational Bulletin www.itu.int/itu-t/bulletin
No. 1276	15.IX.2023	(Information received by 31 August 2023)   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 of ITU-T Recommendations.. 4

Telephone Service:

Bahrain (Telecommunications Regulatory Authority (TRA), Manama).. 5

Guyana (Telecommunications Agency, Georgetown)

Niue (Telecom Niue, Alofi)

Other communication:

Serbia

Service Restrictions.. 15

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

AMENDMENTS  TO  SERVICE  PUBLICATIONS

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

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

National Numbering Plan