Area Code 510
Oakland, CA — California
Area code 510 serves Oakland and California. Get a local 510 number to build instant presence in this market.
Split from 415 in 1991 to serve the East Bay. Oakland and Berkeley anchored the new code.
State
California (CA)
Capital: Sacramento
Time Zone
PT
Pacific Time (PT)
Region
West
US Census region
Code Type
Geographic
Original area code
Where does area code 510 cover?
Area code 510 serves communities across California. Cities below represent the primary coverage area per the NANP.
- Oakland
- Berkeley
- Hayward
- Fremont
- Alameda County
California phone number landscape
California holds more area codes than any other state, reflecting its massive economy — from San Francisco's tech epicenter and Los Angeles' entertainment industry to San Diego's biotech corridor.
Number format
When dialing from outside the US, prefix with +1. Within the US, dial all 10 digits including the area code.
History of Area Code 510
Split from 415 in 1991 to serve the East Bay. Oakland and Berkeley anchored the new code.
Why get a 510 area code number?
A local 510 number gives your business a genuine connection to the California market — without the overhead of a physical location.
Local Market Access
Reach Oakland customers and businesses with a familiar local number. Fremont hosts Tesla's main vehicle-assembly plant and a biotech and clean-tech manufacturing economy. EV and biotech firms rely on a 510 number for this East Bay-innovation credibility.
Professional Credibility
A 510 number anchors your business in Oakland and California, giving clients and partners a recognizable local point of contact that builds immediate professional trust.
Higher Answer Rates
Local area codes are far less likely to be blocked. A 510 number keeps your outreach out of the spam folder.
Flexible Operations
Start with one 510 number and add more as you grow — all managed from a single letsdial dashboard.
How to obtain a 510 phone number.
Step 01 · Sign up
Claim your 510 number in seconds.
Enter your email or sign in with Google — your 510 number for the California area is ready to claim immediately after, no lengthy forms.
Create your account
Free for 14 days. No card required to start.
Benefits of a local California number
A 510 area code tells California customers you're local and easy to reach.
- Local 510 numbers get answered more often than toll-free or out-of-state calls.
- Build local trust and brand recognition without a physical office.
- Keep your personal number private with a dedicated 510 business line.
Why local numbers win
Frequently asked about 510
Area code 510 covers Oakland, Berkeley, Hayward, Fremont, Alameda County in California. It is the primary area code for this region.
Ready to call California your market?
Get a local 510 number for your business in minutes. No contracts, no hardware — just a trusted local presence in California from day one.
Browse other states? View all area codes →