Area Code Lookup
What Area Code Is Oakville?
4 area codes serve Oakville
Oakville is served by area codes 289, 314, 584, 905. It spans Ontario and Missouri and Manitoba.
Area Codes Serving Oakville
Frequently Asked Questions
What area code is Oakville?
Oakville is served by area codes 289, 314, 584, 905.
Why does Oakville have multiple area codes?
As demand for phone numbers increased, NANPA added area codes through splits (dividing the region) or overlays (layering a new code over the same geography). Oakville now has 4 area codes — 289 and 314 and 584 and 905 — covering the same or overlapping areas.
How do I call Oakville from outside the US?
To call Oakville from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-289-XXX-XXXX). The +1 is the country code for all NANPA countries.