What city is ZIP code 94543?

94543 is a Hayward, California ZIP code.

What county is 94543 in?

ZIP code 94543 is in Alameda County, California.

What time zone is ZIP code 94543 in?

94543 is in the Pacific Time zone (America/Los_Angeles).

What area code is 94543?

Phone numbers in ZIP code 94543 use area code 510.

Can I use 94543 for a street address?

No. 94543 is only for PO Boxes. Street addresses in Hayward use 94541, 94542, 94544.

What ZIP codes are near 94543?

The nearest ZIP codes to 94543 are 94541 (Hayward, 0.6 miles), 94542 (Hayward, 2 miles), 94546 (Castro Valley, 2.3 miles) and 94544 (Hayward, 2.3 miles).

ZIP code 94543

Where is ZIP code 94543?

Hayward, California

Alameda County · PO Box only ZIP code

ZIP code 94543 belongs to Hayward, California in Alameda County. 94543 is a PO Box only ZIP code: it is used for post office boxes at the Hayward post office, not for street addresses. It is in the Pacific Time zone and uses area code 510. The closest ZIP codes are 94541 (Hayward, 0.6 mi northwest), 94542 (Hayward, 2 mi east) and 94546 (Castro Valley, 2.3 mi north).

ZIP code	94543
Type	PO Box only (no street delivery)
Status	Active
City	Hayward
State	California (CA)
County	Alameda County
Time zone	Pacific Time · now
Area code	510
Coordinates	37.6688, -122.0808 map
3-digit prefix	945

The Census Bureau doesn’t publish population figures for po box only ZIP codes because nobody lives at a PO Box or a single organization’s address. For figures about the area, see the nearby standard ZIP codes below.

ZIP codes near 94543

ZIP code	City	Distance	Type
94541	Hayward, CA	0.6 mi NW	Standard
94542	Hayward, CA	2 mi E	Standard
94546	Castro Valley, CA	2.3 mi N	Standard
94544	Hayward, CA	2.3 mi S	Standard
94545	Hayward, CA	2.6 mi S	Standard
94580	San Lorenzo, CA	2.7 mi W	Standard
94578	San Leandro, CA	3.3 mi NW	Standard
94552	Castro Valley, CA	3.8 mi NE	Standard
94579	San Leandro, CA	4.1 mi W	Standard
94577	San Leandro, CA	5.6 mi NW	Standard
94587	Union City, CA	5.7 mi S	Standard
94555	Fremont, CA	6.8 mi S	Standard

Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 94543 or measure the distance to another ZIP code.

How to address mail to 94543

JANE SMITH
PO BOX 123
HAYWARD CA 94543

Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (94543-XXXX) helps mail sort faster but isn’t required.

Other ZIP codes in Hayward, CA

All Hayward ZIP codes with population and income →

Questions

What city is ZIP code 94543?: 94543 is a Hayward, California ZIP code.
What county is 94543 in?: ZIP code 94543 is in Alameda County, California.
What time zone is ZIP code 94543 in?: 94543 is in the Pacific Time zone (America/Los_Angeles).
What area code is 94543?: Phone numbers in ZIP code 94543 use area code 510.
Can I use 94543 for a street address?: No. 94543 is only for PO Boxes. Street addresses in Hayward use 94541, 94542, 94544.
What ZIP codes are near 94543?: The nearest ZIP codes to 94543 are 94541 (Hayward, 0.6 miles), 94542 (Hayward, 2 miles), 94546 (Castro Valley, 2.3 miles) and 94544 (Hayward, 2.3 miles).