There is no STD code '0207' in England.
However, 020 is the area code for London, always followed by an eight-digit local number; the "7" following "020" is in fact part of the eight-digit 'local' number.
Occasionally people still display numbers with the spaces in the wrong place, making it look as though the code is 0207, 0208, 0203, etc...
More specifically, most (but not all) UK phone numbers beginning (020) 7xxx xxxx are likely to be in Central London. http://www.magsys.co.uk/telecom/codelook.asp features a tool that may help you confirm a more specific location.
Note that there is no longer any official distinction between inner and outer London in phone numbers - it's quite possible for an (020) 7 number to be used in the outer suburbs, or for (020) 8 numbers to be used in Central London.
UK telephone area code 020 is London. The 020 8357 prefix is used throughout the greater London 020 area, not limited to any specific neighbourhood(s). Furthermore, with number portability, any given 020 number may be located anywhere in the 020 area, served by any local telephone company.
Area code 020 is London.
The 020 8287 prefix is assigned to Virgin Media for use throughout greater London. In addition, with number portability, a particular number could be served by any provider.
UK telephone area code 020 (or +44 20 in international format) is London. A telephone number beginning with 020 7987 is most likely a landline in the Poplar district in Tower Hamlets E14; however, with number portability, any specific 020 number could be located anywhere in the greater London 020 area, served by any local telephone company.
(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but North America (USA, Canada, etc.) uses 011, Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)
In the UK, area code 020 is London. Although you will see frequent references to area code 0207, there is no such code. The 7 is the first digit of the 8-digit local number.
In the UK, there is no area code 0207. Area code 020 is London. Number portability means that it is no longer reliably possible to narrow down a London number to a particular neighbourhood by the first few digits of the number. In fact, the "inner/outer" distinction formerly in the digit 7 or 8 following the area code, no longer holds firm.
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.
If this is a UK telephone number then the (020) area code represents LONDON. London numbers have eight digits and begin 3xxx xxxx or 7xxx xxxx or 8xxx xxxx. The other unused numbers are for future expansion. There is no such area code as 0207 or 0208. The writer has not formatted the number in the correct way. The correct format is always: (020) xxxx xxxx or: +44 20 xxxx xxxx
All UK area codes begin with a 0. There is no area code 6010 in the UK, and there is no 06010 code either.
UK area code 020 is London.
There is no area code 20 in the UK
There is no 01134 code in the UK.
UK domestic area code 020 is London. Although you will often see references to area codes 0208, 0207, and 0203, these are incorrect; the correct area code is just 020, and the next digit is the first digit of the 8-digit local number. However, there are currently no valid numbers beginning with 020 8103.
The country code and area code of Aberdeen, United Kingdom is 44, (0)1224.
Cambridge is in area code 01223, or +44 1223 from outside the UK.
In the UK, 0121 is the area code for Birmingham.
Until the early 1990's, area code +44 21 (or 021 within the UK) was Birmingham, which is now area code +44 121 (or 0121 within the UK). There has never been an area code +44 217 (or 0217) in the UK.