If you mean the international dialling code - it is 44
The dialling code 0131 is used in Edinburgh, Scotland - not in England.
00 353
First dial 00 353 56 and then the local number.
It depends on what part of the Caribbean. See the related links.
The US dialling code from anywhere outside the US is +1
The international dialling code for Ireland is 353 and for the UK (which includes England) it is 44.
Luton's dialling code is 01582.
567218 is not a dialling code from the UK, which all start with zero. The dialling code for Glasgow, Scotland is 0141.
The international dialling code for mainline China is +86
Area code 020 is London, including the old "inner London" and "outer London" areas.
The international dialling code for the UK is +44. You need to drop the leading zero from a UK number when dialling from abroad, so a London number of 020 111 2222 would be +44 20 111 2222.