ITU Operational Bulletin www.itu.int/itu-t/bulletin
No. 1241	1.IV.2022	(Information received by 15 March 2022)   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.. 4

Telephone Service:

Iran (Islamic Republic of) (Communications Regulatory Authority (CRA), Tehran) 4

Service Restrictions. . 8

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

AMENDMENTS  TO  SERVICE  PUBLICATIONS

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

List of Issuer Identifier Numbers for the International Telecommunication Charge Card

List of ITU Carrier Codes. . 11

National Numbering Plan 11