Phone area codes for Oakville, ON
2 active area codes · Eastern Time (EST/EDT, UTC-5/-4) · population 213,759.
Oakville is a town on the western shore of Lake Ontario, between Toronto and Hamilton, known for its harbour and historic core.
Area codes serving Oakville
Dialling from and to Oakville
Because Oakville sits inside an overlay region with 2 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 Oakville 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 Oakville
About Oakville, Ontario
Oakville is located in Ontario, Canada. Oakville is a town on the western shore of Lake Ontario, between Toronto and Hamilton, known for its harbour and historic core. The city falls within the Eastern Time (EST/EDT, UTC-5/-4) time zone.
Numbers issued to subscribers in Oakville can come from any of the area codes assigned to the surrounding numbering plan area: 905, 289. With number portability now standard across all Canadian carriers, the area code attached to a Oakville 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 905 or 289, the caller is most likely either based in Oakville 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.