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.
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.
In the UK, 01709 is the area code for Rotherham.
Bransgore is in area code 01425.
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.
(0141) 630 xxxx seems to be used by BT for Croftfoot and Springburn.