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UK Telephone Numbering Plan Overview

The UK telephone numbering plan, also known as the National Telephone Numbering Plan, is the system used for assigning telephone numbers in the United Kingdom. It is regulated by the UK government's Office of Communications (Ofcom), which holds responsibility for telecommunications.

Since 28 April 2001, almost all geographic numbers and most non-geographic numbers have 9 or 10 national (significant) numbers following the '0' trunk code. All mobile telephone numbers have 10 national (significant) numbers after the '0' trunk code. The overall structure of the UK's National Numbering Plan is:

Prefix   Service type
01 Geographic area codes.
02 Geographic area codes (introduced in 2000).
03 Nationwide non-geographic code, charged to caller at geographic area code rates (introduced 2007). These calls are included free in plans with "inclusive minutes", unlike 08 numbers which incur extra charge.
04 Reserved.
05 Corporate numbering and VoIP services (note: some VoIP services use 08 or geographic numbers).
06 Was reserved for possible use by Personal Numbering instead of 070 following consumer confusion with mobile phones.
07 Personal Numbering on 070, Pagers on 076, mobile phones on 075, 07624, 077, 078, and 079, WiFi numbers on 079112 and 079118.
08 Freephone (toll free) on 080, and Special Services (formerly known as local and national rate) on 084 and 087.
09 Premium Rate services.

In the United Kingdom, Area Codes are two, three, four or, occasionally, five digits long (plus the initial zero). Regions with the shorter area codes are typically the larger cities, and these permit a larger number of telephone numbers to be used there, as the local number has more digits. In the UK the "Area Code" is also referred to as an 'STD (code)' (Subscriber Trunk Dialling) or a 'dialling code'.

The code allocated to the largest population is (020) for London. The code allocated to the largest area is (028) for all of Northern Ireland.

To look-up specific Area Codes / STD Codes / Dialling Codes, please refer to our UK Telephone Code Locator.

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