The 20,000 fake phone numbers

The number is one of 20,000 kept aside by Ofcom, the telecoms regulator, for use in television and radio drama and films following the Big Number change on 22 April 2000, which freed up more capacity on the network. Of these numbers, some 15,000 are geographical ones, often based around large cities or regions, including Leeds, London, Bristol, Tyneside and Northern Ireland. A further 4,000 numbers are held back from everyday use to stand in for mobile numbers (07700), freephone calls (08081), premium rate services (0909) and UK-wide telephones (03069).

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