Area Code Lookup
What Area Code Is Richmond Hill?
3 area codes serve Richmond Hill · Ontario
Richmond Hill is served by area codes 365, 742, 905. It is located in Ontario.
Area Codes Serving Richmond Hill
Frequently Asked Questions
What area code is Richmond Hill?
Richmond Hill is served by area codes 365, 742, 905. It is located in Ontario.
Why does Richmond Hill 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). Richmond Hill now has 3 area codes — 365 and 742 and 905 — covering the same or overlapping areas.
How do I call Richmond Hill from outside the US?
To call Richmond Hill from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-365-XXX-XXXX). The +1 is the country code for all NANPA countries.