510 Area Code

The 510 area code is part of the North American Numbering Plan (NANP) and serves the western and eastern regions of the San Francisco Bay Area in California, USA. Established in 1991 as a split from the 415 area code, 510 covers major cities, suburban areas, and parts of Oakland and surrounding East Bay communities. The area code plays a vital role in residential, business, and governmental communications.

Understanding the 510 Area Code

The 510 area code serves cities such as Oakland, Fremont, Hayward, Berkeley, and Richmond. It supports landline phones, mobile phones, VoIP, and business telecommunications. Local calls require 10-digit dialing due to overlays and area code management policies.

510 Area Code Map and Geographic Location

The 510 area code map covers the East Bay region of the San Francisco Bay Area, including Alameda and western Contra Costa counties. The area encompasses urban centers, suburban neighborhoods, and commercial districts, extending from Oakland to the southern borders near Fremont.

All Major Cities and Regions in the 510 Area Code

  • Oakland
  • Fremont
  • Hayward
  • Berkeley
  • Richmond
  • Union City
  • Piedmont
  • Alameda
  • San Leandro

Counties Covered by the 510 Area Code

  • Alameda County
  • Contra Costa County (western part)

ZIP Codes within the 510 Telephone Zone (Examples)

  • 94601 - Oakland
  • 94536 - Fremont
  • 94541 - Hayward
  • 94704 - Berkeley
  • 94801 - Richmond
  • 94587 - Union City
  • 94611 - Piedmont
  • 94501 - Alameda
  • 94577 - San Leandro

Time Zone

The 510 area code is located in the Pacific Time Zone (PT), observing Pacific Standard Time (PST, UTC-8) in winter and Pacific Daylight Time (PDT, UTC-7) during daylight saving time.

Dialing, Phone & Service Details

  • Overlay: 341 overlay exists, requiring 10-digit dialing
  • Local dialing: 10-digit dialing is required
  • Long-distance calls within the USA: Dial 1 + 510 + 7-digit number
  • International calls: Dial your country�s exit code + 1 + 510 + 7-digit number
  • Services: Landline, mobile, VoIP, and business telecommunications

What area code is 510? / Where's area code 510?

What area code is 510? � 510 is a California telephone area code serving Oakland, Fremont, Hayward, Berkeley, Richmond, and surrounding East Bay cities.

Where's area code 510? � It is located in the East Bay region of the San Francisco Bay Area, California, USA, covering Alameda County and parts of western Contra Costa County.

Frequently Asked Questions (FAQ) about 510 Area Code

What is the 510 area code?

510 serves the East Bay region of the San Francisco Bay Area, including Oakland, Fremont, Hayward, Berkeley, and Richmond.

When was the 510 area code created?

It was established in 1991 as a split from the 415 area code.

Where is area code 510 located?

It is located in the East Bay region of the San Francisco Bay Area, California, USA.

What time zone is 510 in?

The 510 area code follows Pacific Time (PST/PDT).

Does 510 have an overlay?

Yes, the 510 area code has the 341 overlay.

What services does 510 support?

510 supports landline, mobile, VoIP, and business telecommunications.

510 Area Code