ITU Operational Bulletin www.itu.int/itu-t/bulletin
No. 1316	15.V.2025	(Information received by 6 May 2025)   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

Telephone Service:

Iran (Islamic Republic of) (Communications Regulatory Authority (CRA), Tehran) 5

Service Restrictions.. 8

Call-Back and alternative calling procedures (Res. 21 Rev. PP-06).. 8

AMENDMENTS  TO  SERVICE  PUBLICATIONS

List of International Monitoring Stations (List VIII)

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

List of ITU Carrier Codes

National Numbering Plan