Best Answer

Heathrow uses the London area code, which is 020.

A typical London number follows the pattern (020) xxxx xxxx. As an example, the number 020 7222 1234 would be dialled as follows:

From another London 020 landline phone:

7222 1234

From a phone elsewhere in the UK or a mobile phone:

020 7222 1234

From outside the country:

+44 20 7222 1234

(where + represents the international access code used by the country being called from, usually 00 or 011)

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Q: What is the telephone area code for Heathrow England?
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