Area Code Lookup
What Area Code Is Hayward?
2 area codes serve Hayward · California
Hayward is served by area codes 341, 510. It is located in California.
Area Codes Serving Hayward
Frequently Asked Questions
What area code is Hayward?
Hayward is served by area codes 341, 510. It is located in California.
Why does Hayward have multiple area codes?
As demand for phone numbers increased, NANPA added area codes through splits (dividing the region) or overlays (layering a new code over the same geography). Hayward now has 2 area codes — 341 and 510 — covering the same or overlapping areas.
How do I call Hayward from outside the US?
To call Hayward from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-341-XXX-XXXX). The +1 is the country code for all NANPA countries.