ITU Operational Bulletin www.itu.int/itu-t/bulletin
No. 1266	15.IV.2023	(Information received by 3 April 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

International Identification Plan for Public Networks and Subscriptions (Recommendation ITU-T E.212
(09/2016)): Note from TSB

Telephone Service:

Qatar (Communication Regulatory Authority, Doha)

Testing Laboratories recognized by ITU

Service Restrictions. 9

Call-Back and alternative calling procedures (Res. 21 Rev. PP-06) 9

AMENDMENTS  TO  SERVICE  PUBLICATIONS

List of Issuer Identifier Numbers for the International Telecommunication Charge Card

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

List of ITU Carrier Codes