United Kingdom Country Code
For data processing and communications and United Kingdom and it's dependent areas is represent by a United Kingdom Country code. United Kingdom country code is a short numeric geographical code (geocodes) developed by the ISO 3166-1 system. United Kingdom country code is freqently refered to as United Kingdom dialing codes or United Kingdom E.164 calling code.
United Kingdom Country Code is used when dialing to United Kingdom from outside United Kingdom. United Kingdom Country Code is however not used when dialing within United Kingdom.
To call United Kingdom from outside United Kingdom, you have to dial the your own country's International Direct Dialing prefix (IDD), United Kingdom Country Code, City/ Area Code, and then the subscriber telephone number as:
Your Countries International Direct Dialing Prefix (IDD) +44 (United Kingdom Country Code) + City Area Code + Number you wish to call.
When dialing from a mobile phone outside United Kingdom into United Kingdom, Dial '+' +44 (United Kingdom Country Code) + City Area Code + Number you wish to call. (The "+" can be reached by holding down the "0" key until it turns into a "+". The "+" is universal prefix for all international mobile telephone calls including United Kingdom)
United Kingdom International Direct Dialing prefix (or IDD) is used when dialing from the United Kingdom to outside the country (Refer to international dialing United Kingdom code or United Kingdom international access code). Do not use United Kingdom IDD when dialing within United Kingdom.
United Kingdom National Direct Dialing prefix (or NDD) is used when dialing to a destination within the United Kingdom (Refer to dialing United Kingdom code). Do not use United Kingdom National Direct Dialing prefix when dialing from outside United Kingdom into United Kingdom. United Kingdom NDD is only used as long distance dialing within the country.
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