UK Telephone National Number Group Codes

A list of the UK telephone National Number Group dialling codes (sometimes also known as STD codes or area codes) is available as follows:

• A complete text file containing the description of the fields and all information. This is the version required if you want to take a copy for processing (apart from for use with Microsoft Excel, Access and other similarly deficient software).
• In comma separated value format. Specially designed to overcome some of the deficiencies in Microsoft Excel and Access. Note: you will need the description of the fields too.
• One Web page.
• As individual tables on multiple Web pages.
• Description of the fields as ASCII text.

See also Oftel Specified Numbering Scheme data.

The file contains the following fields:

1. The national number group (NNG) code
2. A replacement NNG code, where the code in (1) is not correct.
3. The status of the code (e.g. is it valid, was it changed on Phoneday?)
4. The BT charge rate for calls to numbers in that group
5. The approximate OS grid location, where applicable
6. The approximate latitude and longitude, where applicable
7. A text description (place name or use)
8. The number of Digits in the Area Code
9. See also NNG code (typically another code serving the same, or a similar, area)
10. Operator, if that code is allocated to a single telecommunications operator
11. Charging Area
12. Number of digits in a full telephone number
13. Notes

See the complete description of the fields for more details.

There are two main aims in producing this table:

1. To hold in one place a useful set of information about each NNG code, enabling derived lists for various purposes to be produced easily.
2. To hold information which is current.

The table does not attempt to hold detailed information.

Much of the data is derived, with permission, from data published by Ofcom's Numbering Administration Unit. and is subject to the following conditions:

The information is © Crown Copyright and is published as required by the Numbering Conventions. It may be reproduced with due acknowledgement of the source of the information. Request for commercial publication of the lists should be made to HMSO. No responsibility is accepted for any errors which may be introduced as a result of any such reproduction.