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Guidance on telephone numbering

In this section

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 Document  (430 kB)

Published 13|12|13, updated 11|12|14

RID Application Process - Guidance  PDF Document  (131 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.

Personal Numbering - Guidance on the acceptable use of 070 numbers

Guidance on acceptable use of 070 Telephone Numbers. Revised 24 January 2004

Number Portability information and useful links

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

Telephone Numbers for drama use (TV, Radio etc)

Telephone Numbers for use in TV and Radio drama programmes

Users Guide to Numbering is currently being updated and will be available shortly.

Numbering Forum, Working Groups and Workshops

Numbering Forum, Working Groups and Workshops

Numbering Bulletins

No longer published. Link to old Oftel Bulletins.

ITU-T list of Country Codes

ITU-T webpage showing list of Country Codes.

The London Area Code

London is going to get some extra telephone numbers, starting with (020) 3. These will be used alongside the existing (020) 7 and (020) 8 numbers. They will be given out to some residential and business customers who put in a new line or apply for a new telephone number from the autumn of 2005 onwards

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