These area codes were first assigned

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What is an Area Code? A phone number area code is a short string of numbers mapped to a specific area or location. Codes differ, following different formats in different countries. Area codes are the same regardless of whether you’re calling a virtual phone number or a regular phone number. How Are Area Codes Determined? In the UK, area codes were initially assigned to phone numbers based on the volume of telephone calls made in each area.

The most populous areas such as Birmingham, Edinburgh, Liverpool and Mancheste jordan mobile phone numbers database were assigned area codes that were quick to dial using a rotary dial telephone. Initially, too, the leading letter of the city’s name was assigned as the second number in the code, based on the traditional three-letters per number on the phone’s dial pad. For example, ABC was located on the ‘2’ key/rotary location. Therefore, Birmingham was assigned ‘021’, Edinburgh ‘031’ and so on for all the UK’s major cities.



These area codes were first assigned according to the telephone numbering plan designed for the introduction of Subscriber Trunk Dialling back in the 1950s. Related: Check out our handy guide for choosing the best phone number for your business. What is STD (Subscriber Trunk Dialling) in Telephony? Subscriber Trunk Dialling (STD) is an old technology that enabled calls without the aid of switchboard operators. STD requires a telephone numbering plan, which is a system of mapping phone numbers to various locations or telephone exchanges.