There is no London code 274. London numbers have 8 digits and all start with either 3, 7 or 8. To call London from outside London you would use the London code, ie 020. If you are calling London from outside the UK, you would use +44 and then 20 followed by the rest of the 8 digit numbers.
The country code and area code of KÌ_tahya, Turkey is 90, (0)274.
The country code and area code of Abu Issa, Libya is 218, (0)274.
The country code and area code of El Dambo, Sudan is 249, (0)274.
This isn't a London code. It is the area code for Brentwood in Essex which is about 30 miles northeast of London.
The country code and area code of Chichibu District- Saitama, Japan is 81, (0)274.
The telephone country code for Zimbabwe is +263. The area code for Arcturus is 0274, or +263 274 in international format.
The country code and area code of Acatlan De Perez Figueroa, Mexico is 52, (01)274.
The country code and area code of East London, South Africa is 27, (0)43.
London is area code 020.
In the UK, area code 020 is London. There is no area code 0208.
Bromley is covered by the area code for London, which is 020.
UK area code 020 is London.