Summary - E.156 (09/2025) - Guidelines for ITU-T action on reported misuse of E.164 number resources

Recommendation ITU-T E.156 outlines the procedures for reporting and taking action regarding alleged misuse of numbers. It also outlines the procedures that the Director of the Telecommunication Standardization Bureau should undertake upon receipt of reports of alleged misuse from members, including methods to address and counter any alleged misuse when such reports are brought to the attention of the Director.
Appendix IV reproduces verbatim the attachment to WTSA Resolution 61 (Rev. Dubai, 2012) on "Suggested guidelines for regulators, administrations and operating agencies authorized by Member States for dealing with number misappropriation".