The London telephone area code (020) covers a larger area, similar in size to Greater London, although some outer districts are excluded and some places just outside are included.
Kode area telepon London (020) mencakup area yang lebih besar, cakupannya lebih kurang sama dengan luas London Raya, namun beberapa kawasan pinggiran ditiadakan dan beberapa kawasan di luar London disertakan.