None. If the number starts with '7' it will probably be a mobile (cell) phone.
The area code "029" is assigned to the city Cardiff in Wales, UK.
Slough. There is no 0753 code in the UK.
Nottinghamshire is a county, not a city, so is covered by several different codes.The city of Nottingham itself has the area code of 0115 (or +44 115 from outside the UK).
There is no city in the UK starting with area code 791. All 'area' codes starting with 7 are mobile (cell) phone numbers.
01620, or +44 1620 from outside the UK
Assuming that is a UK phone number - 0121 is the area code for the City of Birmingham.
All UK area codes begin with a 0. There is no area code 6010 in the UK, and there is no 06010 code either.
This isn't a UK city code. UK city codes all start with 01 or 02
UK area code 020 is London.
There is no area code 20 in the UK
There is no 01134 code in the UK.
The country code and area code of Aberdeen, United Kingdom is 44, (0)1224.