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This is a list of telephone dialling codes in the United Kingdom, which adopts an open telephone numbering plan for its public switched telephone network. The national telephone numbering plan is maintained by Ofcom , an independent regulator and competition authority for the UK communications industries.
List of United Kingdom dialing codes. In the United Kingdom, telephone numbers are administered by the Office of Communications ( Ofcom ). For this purpose, Ofcom established a telephone numbering plan, known as the National Telephone Numbering Plan, which is the system for assigning telephone numbers to subscriber stations.
Country calling codes, country dial-in codes, international subscriber dialing (ISD) codes, or most commonly, telephone country codes are telephone number prefixes for reaching telephone subscribers in foreign countries or areas via international telecommunication networks.
Different codes were used for STD and local dialling. Because of this, telephone numbers were usually still stated with the exchange name and subscriber number, e.g. 'Blackawton 299', to allow callers to look up the appropriate code for their call. Local dialling codes
Countries using carrier selection codes. The following is a non-exhaustive list of countries that optionally allow for carrier selection in addition to using the standard prefix listed in the preceding section.
Lists of numbers allocated to BT exchanges in the UK, including London, are available online, and enable the exchange associated with a given number to be found, if applicable. Locations of exchanges, given a postcode in their catchment area, are also documented.
A fixed dialing plan requires to dial all digits of the complete telephone number, including any area codes. Harmonized service numbers. The following service numbers are harmonized across the European Union: 112 for emergency services; 116xxx for (other) harmonized services of social value; Single numbering plan (1996 proposal)
A non-geographic number is a type of telephone number that is not linked to any specific locality. Such numbers are an alternative to the traditional 'landline' numbers that are assigned geographically using a system of location-specific area codes.
Widespread UK telephone code misconceptions, in particular brought on by the Big Number Change in 2000, have been reported by regulator Ofcom since publication of a report it commissioned in 2004. The telephone area code for most of Greater London and some surrounding areas is 020, not "0207", "0208" or "0203".
The structure of UK telephone numbers is a leading zero (replaced with +44 for international calls from outside the UK) followed by the NNG — a 2, 3, 4 or 5 digit dialling code (digits SA in the example below) to different geographic areas of the UK.