Phone area codes for London, ON
4 active area codes · Eastern Time (EST/EDT, UTC-5/-4) · population 422,324.
London is the largest city in southwestern Ontario and a regional centre for health care, education, and insurance. It is home to Western University.
Area codes serving London
Dialling from and to London
Because London sits inside an overlay region with 4 overlapping area codes, callers must always dial 10 digits — even for calls between two phones on the same street. From outside Canada and the United States, dial your international access prefix, then +1, then the 10-digit number.
Mobile carriers in London typically issue numbers from whichever overlay code is currently being released by the NANP relief plan. As a result, two members of the same household frequently carry numbers from two different area codes — for example a long-time resident with an original-assignment number and a newer subscriber with an overlay number.
Major carriers serving London
About London, Ontario
London is located in Ontario, Canada. London is the largest city in southwestern Ontario and a regional centre for health care, education, and insurance. It is home to Western University. The city falls within the Eastern Time (EST/EDT, UTC-5/-4) time zone.
Numbers issued to subscribers in London can come from any of the area codes assigned to the surrounding numbering plan area: 519, 226, 548, 382. With number portability now standard across all Canadian carriers, the area code attached to a London number tells you only where that number was first issued — not who currently carries it or where the device is physically located.
If you are trying to identify a recent call from 519 or 226 or 548 or 382, the caller is most likely either based in London or another community within the same NPA, has previously held a number issued in this area, or — in the case of telemarketing and scam calls — is spoofing a local prefix to increase the chance you pick up.