Geographic Regions and Area Codes

Area code 341 is located in Oakland, California, and covers several regions in the East Bay areas, including Alameda and Contra Costa counties. The major cities within this area code include:

  • Oakland
  • Fremont
  • Hayward
  • Richmond
  • Berkeley
  • Alameda

Introduced on July 22, 2019, as an overlay to the existing 510 area code, it was created to address the growing demand for new telephone numbers. The 341 area code is surrounded by several other area codes, including: