UK telephone area code 020 is London and surrounding areas. It is not possible to narrow down the location any further with the information given. Furthermore, with number portability, any specific 020 number could be located anywhere in the greater London 020 area.
Area code 020 is London, including the old "inner London" and "outer London" areas.
The dialling code 020 8643 is primarily associated with the London area, specifically in the borough of Croydon. This code is part of the larger 020 area code that covers Greater London. If you see this code, it indicates a local call within that region.
This is a code for an area of London but has been written incorrectly. It should read 020 3634
567218 is not a dialling code from the UK, which all start with zero. The dialling code for Glasgow, Scotland is 0141.
020 is the telephone dialling code for all of London.
0141 is Glasgow's dialling code. 952 is not a dialling code in any part of the UK.
Bransgore is in area code 01425.
In the UK, 01709 is the area code for Rotherham.
Paris
The international dialling code is +44 (or 0044). The area code for London is 020, but you drop the leading zero if phoning from abroad. For example, to phone a London number 020 111 2222 from abroad, you would call; 0044 20 111 2222.
Luton's dialling code is 01582.
That's not an area code - it's the first part of a mobile (cell) number.