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Inner London and Outer London are now both in area code 020.

The '7' from old Inner London 0171 numbers was added to the front of the local number, leading many people to mistakenly give 0207 as the area code, but the area code is just 020, with an 8-digit local number.

For example, 0171 222 1234 (Tube info) became 020 7222 1234.

In international format, London is +44 20.

(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but North America (USA, Canada, etc.) uses 011, Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)

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13y ago

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