Download numbering data
Published: 13 March 2024
Last updated: 15 January 2025
We publish 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.
Guidance on the provision of Calling Line Identification facilities and other related services
Published: 26 April 2018
Last updated: 31 October 2024
Guidelines for the provision of Calling Line Identification Facilities and other related services over Electronic Communications Networks Version 2
Statement: Future of telephone numbers - Statement on revenue sharing
Published: 1 December 2023
Last updated: 11 October 2024
This consultation forms part of our ongoing review of telephone numbers (the Future of Numbering Review).
Telecoms numbering
Published: 28 April 2010
Last updated: 11 October 2024
This section provides information about UK telephone numbers, and allows communications providers to apply for telephone numbers from the National Numbering Plan.
Call costs guide
Published: 14 February 2023
Last updated: 8 August 2023
If you’re confused by call charges or don’t know your 0300 from your 0845 and 0844 numbers, then we have the perfect guide for you.
Protecting essential phone boxes
Published: 8 August 2023
Public call boxes can provide a safety net for people without access to a landline or working mobile phone. Under Ofcom rules, thousands of essential phone boxes are protected from removal.
Enforcement programme into compliance with annual geographic number charges
Published: 23 February 2015
Last updated: 19 July 2023
This programme assessed CPs compliance with their requirements to pay Ofcom an annual charge for ‘specified’ geographic numbers.
Telephone numbers for use in TV and radio drama programmes
Published: 1 March 2019
Last updated: 11 May 2023
Ofcom continues to receive requests for Geographic Numbers to be used for drama purposes. In light of this, Ofcom has set out below a range of Geographic Telephone Numbers recommended for drama purposes (1000 numbers within each Geographic Area Code).
Consultation: Calling Line Identification (CLI) authentication – a potential approach to detecting and blocking spoofed numbers
Published: 28 April 2023
we are inviting stakeholders views on our initial thinking about how CLI authentication might work in the UK
Number Portability
Published: 3 April 2023
Number portability is a regulated facility which enables subscribers to change their service provider whilst keeping their existing telephone number. Its purpose is to foster consumer choice and effective competition by enabling subscribers to switch between providers without the costs and inconvenience of changing telephone number