ITU Operational Bulletin www.itu.int/itu-t/bulletin
No. 1216	15.III.2021	(Information received by 1 March 2021)  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

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) 9

List of Issuer Identifier Numbers for the International Telecommunication Charge Card. 10

Mobile Network Codes (MNC) for the international identification plan  for public networks and subscriptions  11

List of ITU Carrier Codes  12

List of International Signalling Point Codes (ISPC) 13

National Numbering Plan. 14