Area codes in Ottawa, Ontario
Ottawa, Ontario uses 3 area codes — 613, 343 and 753. The main Ottawa area code is 613.
Area codes serving Ottawa
Phone numbers in Ottawa are written as ten digits — for example (613) 555-0190 — and fall in the Eastern Time zone.
How Ottawa came to have 3 area codes
The original Ottawa area code is 613, in service since 1947. As the area ran low on available numbers, overlay codes were added over the same region for new phone lines: 343 (2010) and 753 (2022). Existing numbers kept their original code — an overlay never forces anyone to change their number — which is why Ottawa now uses all 3 codes and every local call is dialed with ten digits.
All Ontario area codes · Is a Ottawa call a scam?
Nearby cities
- Kingston area codes
- Montréal area codes
- Rome area codes
- Utica area codes
- Syracuse area codes
- Rochester area codes
- Oshawa area codes
- Schenectady area codes
More cities in Ontario
- Toronto area codes
- Brampton area codes
- Hamilton area codes
- London area codes
- Thunder Bay area codes
- Windsor area codes
- Kitchener area codes
- Barrie area codes
Frequently asked questions
What is the area code for Ottawa?
The main area code for Ottawa, Ontario is 613. Ottawa is now served by 3 area codes in total: 613, 343, 753.
How many area codes does Ottawa have?
Ottawa has 3 area codes: 613, 343, 753.
Why does Ottawa have more than one area code?
As Ottawa used up the numbers available in its original area code (613, in service since 1947), additional "overlay" codes were added over the same area so new phone numbers could keep being assigned.
How do you dial a Ottawa number?
Dial all 10 digits — the area code (613 or 343 or 753) 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.