020 is London. 020-3 numbers can be anywhere in London. The operator who "owns" this number is Frontier Systems.
Note that the area code for London is just 020, not 0203 or 0207 or 0208.
In the UK, area code 020 is London, but there are no numbers beginning with 020 2. Other countries may have similar telephone area codes.
UK area code 020 is London, but there are no valid numbers beginning with 020 4, much less 020 43. Also, the area code for London is just 020, not 020x or 020xx. There are no other UK telephone area codes beginning with 020.
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.
The telephone country code for Vietnam is +84. The area code for Lao cai is 020, or +84 20 in international format.
149.25
There is no area code 0208 in the UK. The area code for London is just 020, with 8-digit local numbers. A number beginning with 020 8749 is most likely a BT landline in Shepherds Bush, but with number portability any specific 020 number could be located anywhere in London, served by any local phone company.
A UK telephone number like (020) 84xx xxxx will be in London. You need to state two more digits in order to be able to work out which part of London; eg. (020) 8484 or (020) 8411 etc.
UK telephone area code 020 is greater London. A number beginning with 020 8262 could be located anywhere in the greater London 020 area; that prefix is not associated with any particular borough, district, or neighbourhood. Furthermore, with number portability, any 020 number could be located anywhere in greater London, served by any local telephone company.
In the UK, area code 020 is for landlines in London. 84 would be the first two digits of an eight-digit local number.
UK telephone area code 020 is London, including both the former "Inner London" and "Outer London" zones. A number beginning with 020 7485 is most likely a BT landline in Kentish Town, but with number portability any particular 020 number could be located anywhere in the greater London 020 zone, served by any local telephone company.
London is area code 020.
UK telephone area code 020 is greater London. For a number beginning 020 3553, it is not possible to narrow down the location any further, even as to the old "inner/outer" London division. It could be anywhere in greater London.