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27 de abr. de 2023 · History Main article: 020 London had a large network of manual exchanges (80 in 1927) and individual telephone exchanges were given names, e.g. Ebbsfleet; a caller asked the operator for Ebbsfleet 1234.

Telephone directories for these cities showed the first three letters of the exchange in bold capital letters, when all seven digits were to be dialed. For example, a subscriber number for Scotland Yard on London's Whitehall exchange was shown as "WHItehall 1212".

15 de set. de 2023 · This is a list of telephone exchanges located within Greater London. Occasionally, in areas of high demand, two exchanges are located at the same premises; for example Canary Wharf and Poplar.

Telephone exchanges in the London Borough of Barking and Dagenham ‎ (3 F) Telephone exchanges in the London Borough of Barnet ‎ (7 F) Telephone exchanges in the London Borough of Bexley ‎ (2 F) Telephone exchanges in the London Borough of Brent ‎ (1 F) Telephone exchanges in the London Borough of Bromley ‎ (3 F)