ITU Operational Bulletin |
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No. 1273 |
1.VIII.2023 |
(Information received by 14 July 2023) ��ISSN 1564-5223 (Online) |
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E-mail:��� itumail@itu.int |
Standardization Bureau (TSB) |
Radiocommunication Bureau (BR) |
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)