ITU Operational Bulletin
1f8a81b9b0707b63-19211.webchannel-proxy.scarabresearch.com/itu-t/bulletin

No. 1273

1.VIII.2023

(Information received by 14 July 2023) ��ISSN 1564-5223 (Online)

Place des Nations CH-1211
Gen�ve 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

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

Data Transmission Service(Recommendation ITU-T X.121 (10/2000)) :�

United States (Federal Communications Commission, Washington)

Telephone Service:

Denmark (Agency for Data Supply and Infrastructure, Copenhagen)

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 Signalling Area/Network Codes (SANC)

List of International Signalling Point Codes (ISPC)

List of Data Network Identification Codes (DNIC)