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This is a list of telephone dialling codes in the United Kingdom and the Crown Dependencies, 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.
This is used for forty smaller towns which have a mixture of six and five digit local numbers, each type allocated in specific DE blocks*; e.g. in the 01647 area code numbers beginning 24 and 61 have five digits (24xxx and 61xxx; known as 4+5 format) whereas all other DE blocks* within that area code have six digit numbers.
Subscribers on the 0803 exchanges dialled local codes beginning 8 to call numbers on the 0804 satellites; for example, a local code of 822 was used to dial from Torquay to Dittisham, whose STD code was 080 422. Meanwhile, subscribers on 0804 satellite exchanges used a mixture of codes beginning 8 to route calls on direct paths to nearby ...
Each city with a director system was assigned a three-digit code, in which the second digit corresponded to the first letter of the city name on the telephone dial, except London which had the two-digit code 01. Codes were later changed (e.g., London became 020, and Manchester 0161). 01 London; 021 Birmingham; 031 Edinburgh; 041 Glasgow; 051 ...
The first was an update to a small number of geographic dialling codes in response to the rapid late-1990s growth of telecommunications and impending exhaustion of local numbers in several cities. The change greatly expanded the pool of available numbers within those places while retaining 'local dialling' (the ability to dial local numbers ...
In the Director areas the old codes continued to work in parallel with new codes until 1970 when the "ANN: All-figure Numbers Now" advertising campaign prompted callers to dial only the new codes. [3] By October 1969 in Edinburgh 79% of calls were being made using the new local exchange codes, in London 72% and in Glasgow 43%.
Telephone numbers listed in 1920 in New York City having three-letter exchange prefixes. In the United States, the most-populous cities, such as New York City, Philadelphia, Boston, and Chicago, initially implemented dial service with telephone numbers consisting of three letters and four digits (3L-4N) according to a system developed by W. G. Blauvelt of AT&T in 1917. [1]
Logo used in informational material. PhONEday was a change to telephone numbering in the United Kingdom on Sunday 16 April 1995. A shortage of unique telephone numbers in the old dialling system meant that it was becoming increasingly difficult in certain areas of the country to assign unique numbers to new subscribers.