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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
(156 kB)
Published 19|12|11
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 Bulletins
No longer published. Link to old Oftel Bulletins.
ITU-T list of Country Codes
ITU-T webpage showing list of Country Codes.