Phone area codes for Guelph, ON
2 active area codes · Eastern Time (EST/EDT, UTC-5/-4) · population 143,740.
Guelph is a city in southwestern Ontario known for its university, agricultural research, and well-preserved limestone architecture.
Area codes serving Guelph
Dialling from and to Guelph
Because Guelph 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 Guelph 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 Guelph
About Guelph, Ontario
Guelph is located in Ontario, Canada. Guelph is a city in southwestern Ontario known for its university, agricultural research, and well-preserved limestone architecture. The city falls within the Eastern Time (EST/EDT, UTC-5/-4) time zone.
Numbers issued to subscribers in Guelph can come from any of the area codes assigned to the surrounding numbering plan area: 519, 226. With number portability now standard across all Canadian carriers, the area code attached to a Guelph 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, the caller is most likely either based in Guelph 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.