Area codes in Guelph, Ontario
Guelph, Ontario uses 3 area codes — 519, 226 and 548. The main Guelph area code is 519.
Area codes serving Guelph
Phone numbers in Guelph are written as ten digits — for example (519) 555-0190 — and fall in the Eastern Time zone.
How Guelph came to have 3 area codes
The original Guelph area code is 519, in service since 1953. As the area ran low on available numbers, overlay codes were added over the same region for new phone lines: 226 (2006) and 548 (2016). Existing numbers kept their original code — an overlay never forces anyone to change their number — which is why Guelph now uses all 3 codes and every local call is dialed with ten digits.
All Ontario area codes · Is a Guelph call a scam?
Nearby cities
- Kitchener area codes
- Brampton area codes
- Hamilton area codes
- Oakville area codes
- Toronto area codes
- London area codes
- Barrie area codes
- Oshawa area codes
More cities in Ontario
Frequently asked questions
What is the area code for Guelph?
The main area code for Guelph, Ontario is 519. Guelph is now served by 3 area codes in total: 519, 226, 548.
How many area codes does Guelph have?
Guelph has 3 area codes: 519, 226, 548.
Why does Guelph have more than one area code?
As Guelph used up the numbers available in its original area code (519, in service since 1953), additional "overlay" codes were added over the same area so new phone numbers could keep being assigned.
How do you dial a Guelph number?
Dial all 10 digits — the area code (519 or 226 or 548) followed by the 7-digit local number. From abroad, dial +1, then the area code and number.
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of August 2, 2026. Refreshed monthly.