ITU-T - International Telecommunication Union/ITU Telcommunication Sector
Latest
ITU-T E.169.1-2019
Scope
This Recommendation details the application of the ITU-T Rec. E.164 Numbering Plan for Universal International Freephone Numbers (UIFN) in the provisioning of International Freephone Service (IFS) as defined in ITU-T Rec. E.152. The assignment of numbering resources to applicants under E.169.1 is the function esponsibility of the centralized ITU Numbering Administration Group (ITU-NAG) within the ITU-T TSB.