Telecoms numbering


This section provides information about UK telephone numbers, and allows communications providers to apply for telephone numbers from the National Numbering Scheme. It also provides information on numbering policy such as number portability, and the use of 070 telephone numbers.

National Telephone Numbering Plan

This is a PDF document - to search using Adobe Reader press Ctrl + F and type in the number to look for matching locations.

Applying for telephone numbers
From 8 December 2014, Ofcom has a new on-line system to apply for telephone numbers.

Harmonised European numbers for harmonised services of social value (116XXX numbers)
Information on 116 numbers, including register of numbers available in the UK and details of the comparative selection process.

Consumer protection test for telephone number allocation
Details of Ofcom’s Consumer Protection Test and access to the under assessment list and the number refusal list.

Numbering management system (NMS) help guide PDF, 2.4 MB
Explanations of NMS user types and their roles.

The National Numbering Scheme - telephone numbers administered by Ofcom

Details of allocations and availability of UK telephone numbers. Information available to view as Excel 97 files. This information is updated weekly where possible. Updated 30 November 2016

Number block transactions

Allocations, protections, etc (including any withdrawals), over rolling 12 months, for telephone numbers beginning 01-09, and access codes (DQ codes and indirect access codes). This information is updated weekly where possible.

Communications providers are responsible for ensuring that their records are updated to reflect the most recent changes to the National Numbering Scheme.

To help make communications providers aware of changes to telephone numbers, and hence to help them update their records, Ofcom has created two lists of transactions based on allocation/transfer of telephone numbers made over a rolling 12 month period (please note that transferred numbers will also be shown as 'allocated').

There are two lists - in MS Excel format:

Telephone numbers beginning 01-09

Codes used for indirect access, and directory enquiries ("DQ")

Geographic telephone numbers: Guidance for communications providers on the administrative arrangements for the pilot scheme to charge for geographic numbers
This document provides guidance on the administrative arrangements for the pilot scheme. (Publication date: 27 March 2013)

Harmonised European numbers for harmonised services of social value (116XXX numbers)
Information on 116 numbers, including register of numbers available in the UK and details of the comparative selection process

The National Telephone Numbering Plan PDF, 769.6 KB
Current Version published 01|07|15

RID application Process - Guidance PDF, 721.1 KB
Step by step guide on how to apply for your RID code

Code of practice for numbers in 'closed' ranges
For example 0800 Freephone range.

Guidance on bodies eligible to use ‘030’ telephone numbers
Version 3 - 1 October 2008

Personal numbering - guidance on the acceptable use of 070 numbers
Guidance on acceptable use of 070 telephone numbers. Revised 24 January 2004

Number portability
Number portability is a facility which enables customers to change their service provider while retaining their existing telephone number.

Telephone numbers for use in TV and radio drama programmes
Ofcom continues to receive requests for geographic numbers to be used for drama purposes. In the 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).

Reseller identification codes (RIDs) are a type of code that Ofcom allocates to communications providers (CPs) for administrative purposes. They are three-character alphabetic codes which are used in the Notification of Transfer (NoT) switching process and can be used it identify a reseller of wholesale services.

A full list of allocated RID codes updated every week, usually on Wednesday.

If you wish to apply for a RID code you can do so by using Ofcom’s number management system (NMS).

A step by step RID application guide PDF, 721.1 KB will help you in the application process.

If you have any queries please contact the Numbering Team on 0300 123 3000.