WARNING: This website is not an official ITU resource. The data on this website has not been validated. Users of the ITU Operational Bulletin are encouraged to refer to the official ITU Operational Bulletin issues.

ITU Operational Bulletin is the medium for the exchange of information on changes in international telecommunication networks and services. Each edition includes informational notices and amendments to ITU Service Publications. (Read more about ITU OB.)

The ITU Operational Bulletin is published every two weeks by the Telecommunication Standardization Bureau (TSB) and the Radiocommunication Bureau (BR) of the International Telecommunication Union. It disseminates operational information of importance to administrations, recognized operating agencies and the broader international telecommunication community — including updates to the Lists annexed to the Bulletin, signalling code assignments, numbering-plan information and approved ITU-T Recommendations.

ITU OB Online is an effort to make the ITU Operational Bulletin messages and associated Service Publications easier to view and navigate via a fully-featured Web interface and machine-readable APIs.

While the information is being filled in, some editions of ITU OB and ITU Service Publications may be missing here. In such cases please refer to the authoritative ITU OB resourceon the ITU website.

The current edition, No. 1343, was published on 1.VII.2026.