Ofcom has published a statement introducing new rules about the use of Global Titles in mobile networks, aiming to reduce misuse and better protect users’ security and privacy.
Global Titles are special numbers created from UK telephone numbers that mobile networks use to send and receive signals for connecting calls and texts. These numbers are important for mobile services, but if misused, they can allow bad actors to intercept messages and calls, disrupt networks, or track the location of users.
To address these risks, Ofcom has decided on several new measures:
- Mobile operators are now banned from leasing Global Titles to third parties.
- Third parties are no longer allowed to create or use Global Titles from numbers that have been sub-allocated to them.
- Ofcom has published new guidance for operators who hold number ranges, outlining their responsibilities to prevent the misuse of Global Titles.
- The rules have also been strengthened to prohibit the creation or use of Global Titles from numbers not allocated for use.
These changes are intended to significantly reduce malicious activity involving UK Global Titles, increasing transparency and accountability among network operators.
The new rules take effect immediately for any new leasing arrangements or new use of Global Titles from sub-allocated numbers. Operators must also follow the new guidance straight away. For existing leases and current uses, the ban will come into force on 22 April 2026, giving businesses time to make alternative arrangements. In two specific cases, current leases can continue until 22 October 2026 due to the complexity of transitioning and because there is no evidence of misuse.
Ofcom’s decision is expected to help protect both UK and international mobile users. Mobile providers are encouraged to review their current arrangements, ensure they comply with the updated rules, and refer to the new guidance as needed. For more information, providers can contact Ofcom at globaltitles@ofcom.org.uk.