Summary - E.1120 (02/2025) - Assignment procedures for international telecommunication numbering, naming, addressing and identification (NNAI) resources

Recommendation ITU-T E.1120 specifies procedures to be used by an applicant, the Director of the Telecommunication Standardization Bureau (TSB) and the appropriate ITU-T Study Group1 (currently ITU-T SG2), for the assignment of:
–ITU-T E.164 identification codes (ICs) associated within the shared country codes (CCs) for the networks category of ITU-T E.164, whose combination is designated CC + IC.
–ITU-T E.212 shared mobile country codes for networks and their respective mobile network codes.
–ITU-T E.118.1 assigned global issuer identifier numbers (IINs).
–ITU-T E.218 shared terrestrial trunk radio access mobile network codes.