Area Code Lookup
What Area Code Is Riverside?
2 area codes serve Riverside · California
Riverside is served by area codes 909, 951. It is located in California.
Area Codes Serving Riverside
Frequently Asked Questions
What area code is Riverside?
Riverside is served by area codes 909, 951. It is located in California.
Why does Riverside 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). Riverside now has 2 area codes — 909 and 951 — covering the same or overlapping areas.
How do I call Riverside from outside the US?
To call Riverside from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-909-XXX-XXXX). The +1 is the country code for all NANPA countries.