020 area code - London
020 is the UK landline area code for London. From abroad, dial +44 20 followed by the local number.
020 numbers on WhoCallsYou
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About 020 calls
Calls to 020 numbers cost the same as other UK landline calls and are usually included in your minutes. A 020 number on your screen suggests a line registered in London, but internet phone services let callers use local-looking numbers from anywhere. Scammers sometimes fake local numbers so you are more likely to answer.