ITU Operational Bulletin www.itu.int/itu-t/bulletin
No. 1221	1.VI.2021	(Information received by 14 May 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

Assignment of Signalling Area/Network Codes (SANC): Note from TSB. . 4

Telephone Service:

Hungary (National Media and Infocommunications Authority, Budapest) 5

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. . 10

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

List of ITU Carrier Codes. . 12

List of Signalling Area/Network Codes (SANC) 12

List of International Signalling Point Codes (ISPC) 13

National Numbering Plan. . 14