Finance
UK Regulator Closes Loophole That Allowed Rogue Companies to Track Phone Users' Location
Published by Global Banking & Finance Review®
Posted on April 23, 2026
2 min readLast updated: April 23, 2026
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Ofcom has banned the leasing of “Global Titles” — special signal‑routing identifiers in mobile networks — to close a loophole that enabled criminals to intercept calls, messages, and even track users globally.
UK Regulator Ofcom Bans Telecom Loophole Enabling Phone Location Tracking
By Raphael Satter
Ofcom Closes Loophole in Telecom System
April 23 (Reuters) - British authorities say they have closed a loophole that could allow rogue actors to secretly track mobile phone users through the international telecommunications system.
Ban on Leasing "Global Titles"
In a statement, the U.K. regulator Ofcom said it had banned the leasing of so-called "Global Titles," which are special phone numbers that can be used to transmit signaling messages across the global network.
Legitimate Uses and Criminal Exploitation
Such titles are typically used by telecom operators to help ensure the smooth operation of the network - for example by helping deliver messages to users who are "roaming" on other networks - but Ofcom said that criminals could use them "to intercept and divert calls and messages, and get their hands on information held by mobile networks."
Location Tracking Risks
In some cases, the regulator said the titles "can be exploited by criminals and other harmful actors to track the physical location of individuals anywhere in the world."
Growing Concerns Over Telecom Vulnerabilities
Cybersecurity professionals are increasingly focused on the vulnerabilities built into the world's telecommunications infrastructure, some of whose messaging protocols date back decades.
Citizen Lab Report Highlights Surveillance Abuse
Ofcom's statement came hours before the Canadian internet watchdog group Citizen Lab issued a report on Wednesday covering how suspected surveillance companies were abusing telecom infrastructure to surveil an unnamed "well-known company executive" and track mobile phone users around the world.
(Reporting by Raphael Satter; Editing by Aurora Ellis)
Key Takeaways
- •Ofcom’s ban on new Global Title leasing is effective immediately; existing leases must end by 22 April 2026, with limited transitional exceptions until 22 October 2026 (ofcom.org.uk).
- •Global Titles have been exploited to intercept SMS, calls, and geolocate individuals via vulnerabilities in signaling protocols like SS7 and Diameter (ofcom.org.uk).
- •The Citizen Lab’s report—released the same day—highlights real‑world abuse of signaling infrastructure by surveillance vendors to track mobile users worldwide (techcrunch.com).
References
Frequently Asked Questions about UK regulator closes loophole that allowed rogue companies to track phone users' location
1What loophole did UK regulator Ofcom close?
Ofcom closed a loophole allowing the leasing of Global Titles, which could be used by rogue actors to track mobile phone users through the telecom network.
2How were Global Titles being misused?
Criminals exploited Global Titles to intercept calls and messages, obtain information from mobile networks, and track the physical location of individuals.
3Why are telecom infrastructure vulnerabilities a concern?
Telecom infrastructure uses some protocols dating back decades, and these can be abused for surveillance and tracking by malicious actors.
4What is the significance of Ofcom's action?
The ban increases network security by preventing unauthorized tracking and interception of information across the UK telecom system.
5Who highlighted further abuse of telecom infrastructure after Ofcom's statement?
Citizen Lab published a report on suspected surveillance companies abusing telecom systems to track phone users globally.
