Riverside County · California
Riverside, CA area codes and time zone
Quick answer
Riverside is served by area codes 510, 909, 951, keeps PST time (GMT-8), and sits in county FIPS 06065.
- Area codes
- 510 · 909 · 951Within 25 miles of the city centre
- Time zone
- PSTAmerica/Los_Angeles
- UTC offset
- GMT-8PDT in summer (UTCGMT-7)
- County FIPS
- 06065Riverside County
Dialling from and to Riverside
What this means when you pick up the phone.
Because more than one code covers this area, ten-digit dialling applies for local calls: area code plus number, every time. From abroad, dial +1 then the ten digits.
How Riverside came to have several area codes
Why one city can carry several codes.
Area codes are assigned to geography, then exhausted as demand grows. Riverside — population about 315k — is covered by codes 510, 909, 951, drawn from within 25 miles of the city centre. Because these 3 codes serve the same footprint, they are overlays: the number pool ran low and a new code was layered on top rather than splitting the city apart. All ten digits are required for every local call.
More Riverside data
Other Riverside datasets on this site.
- Riverside population and income
- Riverside sales tax rate
- Riverside property tax
- Riverside cost of living
- Riverside home values and rent
- Riverside crime rates
- Riverside public schools
- Riverside weather normals
- Riverside commute times
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