Phone numbers

Data on which UK telephone numbers are available for allocation or are allocated, and lists of codes for use in number porting and other administrative tasks.

Ofcom has today fined telecoms provider, Tismi, for failing to take appropriate and proportionate steps to ensure allocated numbers were not misused, including to perpetrate scams.

Ofcom has today opened an investigation into Xtra Phones, which operates under the trading name Compare The Networks.

Ofcom has opened two separate investigations into telecoms providers, Vonage Business Limited and Voxbone SA, relating to concerns that telephone numbers held by the companies are being misused, including to perpetrate scams.

Investigation into whether the communication provider, Voxbone, has failed to comply with obligations under General Conditions B1 relating to the effective and efficient use of telephone numbers.

Investigation into whether the communications provider, Vonage Business Limited, has failed to comply with obligations under General Conditions B1.6, B1.8, and/or B1.9(c) which relate to the effective and efficient use of telephone numbers.

Find out more about phone numbers, call costs, unwanted calls, premium rate services and keeping your number when you switch phone provider.

Guidelines for the provision of Calling Line Identification Facilities and other related services over Electronic Communications Networks Version 2

This webpage contains Ofcom’s publication of our general demand for financial information relating to PRS revenues under article 55 of the Regulation of Premium Rate Services Order 2024, S.I. 2024/1046 (PRS Order) for the purposes of calculating Ofcom’s related administrative charges.

This section provides information about UK telephone numbers, and allows communications providers to apply for telephone numbers from the National Numbering Plan.