Pick 510 if the number should read as the East Bay.
Hayward is on the list of places 510 serves, with San Leandro, Union City and Newark.
The area codes for Hayward are 510 and 341.
Area codes in Hayward
Get a phone number with the right area code for Hayward.
Hayward sits between Oakland and Fremont and uses 510 and 341, the East Bay codes. The area has had two codes since 2019.
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Pick 510 for Hayward, or 341 if you want the code added in 2019.
Pick 341 for the newer code of the same area.
The California Public Utilities Commission approved it as an overlay on June 21, 2018.
Pick 925 if the number is for Pleasanton or Livermore.
Those towns lie east of the hills and use 925, which was split from 510 in 1998.
People filed 118 FCC complaints about unwanted calls from Hayward area codes in 12 months.
From October 2025 to September 2026, 118 unwanted-call complaints filed with the FCC gave a caller ID number that started with 510 and 341. 510 was named most, on 88 of them (75%).
- 118unwanted-call complaints named a Hayward code
- 510was named on the most of them, 88
- 75%of the Hayward complaints named 510
Source: Federal Communications Commission, CGB - Consumer Complaints Data (dataset 3xyp-aqkj), issue "Unwanted Calls", read on November 4, 2026. Caller ID can be faked, so a code shows what appeared on the phone, not where the caller was.
This is how you get a Hayward number.
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Type the code you picked.
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People ask these questions about Hayward area codes.
More in the full FAQ.
Yes. Hayward is one of the Alameda County cities in 510, with Oakland, Fremont and San Leandro.
On July 22, 2019, when 341 entered service. Dialing 1 plus all ten digits had become mandatory the month before.
A local call in Hayward is dialed with 1 plus ten digits, whichever of its codes the number starts with. The area code is part of every number you give out.
From October 2025 to September 2026, people filed 118 FCC complaints about unwanted calls from numbers that start with a Hayward code: 510 (88) and 341 (30). A complaint is one person's report. Caller ID can be faked, so a code shows what appeared on the phone, not where the caller was.
Yes. You type the area code you want when you create a number, and you do not need to live in Hayward. Calls ring the phone you already have, and texts land in your ExpressNumber inbox.
No. Your numbers are receive-only: they take calls and texts, and they never make them. You answer calls on your own phone, and you cannot reply to a text from the inbox.
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Codes around Hayward
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Every fact on this page comes from public numbering records.
The codes, the places and the years are rows of the North American Numbering Plan Administrator's area code database, and the complaints are the FCC's own.
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