Insights & Resources

Oakland 510 Area Code Gets New Overlay

The Oakland area is adding a new area code, 341, on top of the existing 510 numbers to ensure a continuing supply of phone numbers

Michael Bratschi
Oakland bridge banner image
The Oakland area is adding a new area code – 341 – on top of the existing 510 numbers to ensure a continuing supply of phone numbers. Live in this area of California? Make sure you’re aware of some of the changes happening when dialing locally.

New 341 Area Code Overlay

An area code overlay happens when a new area code – 341 in this instance – is added to the same geographic region of an existing area code.

510 Area Codes Affected

If you currently have a 510 number then you will be affected. This area code services the following cities in the Alameda and Contra Costa counties:
  • Alameda
  • Albany
  • Berkeley
  • Emeryville
  • Fremont
  • Hayward
  • Newark
  • Oakland
  • Piedmont
  • San Leandro
  • Union City
  • El Cerrito
  • Hercules
  • Pinole
  • Richmond
  • San Pablo

How 510 Area Codes Are Affected by 341

If you currently have a 510 phone number, there are two things that you need to do:
Change how you dial local phone numbers. The new procedure requires that you dial the area code + telephone number or 1 + area code + telephone number regardless if you’re dialing a 510 or 341 phone number. Get used to dialing 10 or 11 digits instead of seven!
Change your automated services. Make sure that equipment currently programmed to dial 7 digits is updated to reflect the change. This includes life safety systems, medical monitoring devices, PBXs, fax machines, internet dial-up numbers, alarm security systems and gates, speed dialers, call forwarding settings and voicemail services, to name a few.

Key Dates For 341 Rolling Out

December 15, 2018 - start using the new calling procedure 1 + area code + telephone number
June 22, 2019 - you must use the new dialing procedure or your local calls will not go through
July 22, 2019 - new lines or services in the area may be given numbers from the new 341 area code
Remember: your phone number will not change, it’s just how you dial locally that will. The price of your calls will also remain the same – you’ll still be calling locally if you live in the area regardless if you’re dialing 510 or 341.
If you have questions, don’t hesitate to contact us at +1.888.980.9750.
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