Phone area codes for Longueuil, QC
3 active area codes · Eastern Time (EST/EDT, UTC-5/-4) · population 254,483.
Longueuil sits on the south shore of the St. Lawrence opposite Montreal and is the fifth-largest city in Quebec.
Area codes serving Longueuil
Dialling from and to Longueuil
Because Longueuil sits inside an overlay region with 3 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 Longueuil 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 Longueuil
About Longueuil, Quebec
Longueuil is located in Quebec, Canada. Longueuil sits on the south shore of the St. Lawrence opposite Montreal and is the fifth-largest city in Quebec. The city falls within the Eastern Time (EST/EDT, UTC-5/-4) time zone.
Numbers issued to subscribers in Longueuil can come from any of the area codes assigned to the surrounding numbering plan area: 450, 579, 354. With number portability now standard across all Canadian carriers, the area code attached to a Longueuil 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 450 or 579 or 354, the caller is most likely either based in Longueuil 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.