District of California area codes: 510 | |
---|---|
Country | United States |
State/Province | California |
Major City | San Jose |
Time Zone | Pacific (UTC-08:00) |
Prefix | County | Primary City | Company |
---|---|---|---|
510-222 | Contra Costa | El Sobrante, CA | Pacific Bell |
510-223 | Contra Costa | El Sobrante, CA | Pacific Bell |
510-224 | Contra Costa | Hercules, CA | Sprint Spectrum L.p. |
510-225 | San Francisco | San Francisco, CA | Allegiance Telecom |
510-226 | Alameda | Fremont, CA | Pacific Bell |
510-227 | Alameda | Oakland, CA | Tw Telecom Of California Lp |
510-228 | Alameda | Oakland, CA | Pac - West Telecomm |
510-229 | Alameda | Oakland, CA | Pacific Bell |
510-230 | Contra Costa | Richmond, CA | T-mobile Usa |
510-231 | Contra Costa | Richmond, CA | Pacific Bell |
510-232 | Contra Costa | Richmond, CA | Pacific Bell |
510-233 | Contra Costa | Richmond, CA | Pacific Bell |
510-234 | Contra Costa | Richmond, CA | Pacific Bell |
510-235 | Contra Costa | Richmond, CA | Pacific Bell |
510-236 | Contra Costa | Richmond, CA | Pacific Bell |
510-237 | Contra Costa | Richmond, CA | Pacific Bell |
510-238 | Alameda | Oakland, CA | Pacific Bell |
510-239 | Alameda | Oakland, CA | Mpower Communications Corp |
510-240 | Alameda | Union City, CA | Tw Telecom Of California Lp |
510-242 | Contra Costa | Richmond, CA | Pacific Bell |
There are 689 prefixes, In the code area, the major cities are Alameda, CA;Berkeley, CA;Castro Valley, CA;El Cerr. The major city is San Jose.