Area Code Lookup
What Area Code Is Hamilton?
5 area codes serve Hamilton
Hamilton is served by area codes 289, 513, 742, 762, 905. It spans Ontario and Ohio and Georgia.
Area Codes Serving Hamilton
Frequently Asked Questions
What area code is Hamilton?
Hamilton is served by area codes 289, 513, 742, 762, 905.
Why does Hamilton 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). Hamilton now has 5 area codes — 289 and 513 and 742 and 762 and 905 — covering the same or overlapping areas.
How do I call Hamilton from outside the US?
To call Hamilton 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.