Phone area codes for St. Catharines, ON
1 active area code · Eastern Time (EST/EDT, UTC-5/-4) · population 136,803.
St. Catharines is the largest city in the Niagara Region of Ontario, located between Lake Ontario and the Niagara Escarpment.
Area codes serving St. Catharines
Dialling from and to St. Catharines
Because St. Catharines sits inside a single-NPA region, callers may still be able to use 7-digit local dialling, though 10-digit dialling is universally accepted. From outside Canada and the United States, dial your international access prefix, then +1, then the 10-digit number.
Mobile carriers in St. Catharines 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 St. Catharines
About St. Catharines, Ontario
St. Catharines is located in Ontario, Canada. St. Catharines is the largest city in the Niagara Region of Ontario, located between Lake Ontario and the Niagara Escarpment. The city falls within the Eastern Time (EST/EDT, UTC-5/-4) time zone.
Numbers issued to subscribers in St. Catharines can come from any of the area codes assigned to the surrounding numbering plan area: 905. With number portability now standard across all Canadian carriers, the area code attached to a St. Catharines 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, the caller is most likely either based in St. Catharines 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.