ITU Operational Bulletin
www.itu.int/itu-t/bulletin

No. 1239

1.III.2022

(Information received by 11 February 2022)  ISSN 1564-5223 (Online)

Place des Nations CH-1211
Genève 20 (Switzerland)
Tel:            +4
1 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

Approval of ITU-T Recommendations

Telephone Service:

Barbados (Ministry of Innovation, Science and Technology, St. Michael)

Service Restrictions

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

AMENDMENTS  TO  SERVICE  PUBLICATIONS

List of Issuer Identifier Numbers for the International Telecommunication Charge Card 

List of ITU Carrier Codes 

List of International Signalling Point Codes (ISPC)

National Numbering Plan