Area Code Lookup
What Area Code Is Johnston?
3 area codes serve Johnston
Johnston is served by area codes 401, 803, 839. It spans Rhode Island and South Carolina.
Area Codes Serving Johnston
Frequently Asked Questions
What area code is Johnston?
Johnston is served by area codes 401, 803, 839.
Why does Johnston 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). Johnston now has 3 area codes — 401 and 803 and 839 — covering the same or overlapping areas.
How do I call Johnston from outside the US?
To call Johnston from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-401-XXX-XXXX). The +1 is the country code for all NANPA countries.