Area Code Lookup
What Area Code Is Duncan?
2 area codes serve Duncan
Duncan is served by area codes 236, 580. It spans British Columbia and Oklahoma.
Area Codes Serving Duncan
Frequently Asked Questions
What area code is Duncan?
Duncan is served by area codes 236, 580.
Why does Duncan 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). Duncan now has 2 area codes — 236 and 580 — covering the same or overlapping areas.
How do I call Duncan from outside the US?
To call Duncan from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-236-XXX-XXXX). The +1 is the country code for all NANPA countries.