Skip to content
Country Dialing CodesConnecting a more open world A clearer
more connected world.
US area code · California

Area code 628

Where the 628 area code is, its overlay and how to dial a +1 628 number from anywhere.

CoversSan Francisco, CaliforniaTime zonePacific (PT)TypeOverlay
Quick answer

The 628 area code is in San Francisco, California, United States (Pacific (PT)). To call from abroad: +1 628 555-0123. It is an overlay, so all 10 digits are dialled.

StateCalifornia
Main areaSan Francisco
Time zonePacific (PT)
TypeOverlay
10-digit dialingRequired
In service since19-Dec-2013

The 628 area code is a geographic North American Numbering Plan (NANP) code covering San Francisco, California. It has been in service since 19-Dec-2013 and sits in the Pacific (PT) time zone.

Overlay 628 shares its region

Several area codes cover the same geographic area, so two neighbours can have different codes. Because of the overlay, you must dial all 10 digits (area code + number) even for local calls.

628415

How to dial a 628 number

From abroad+1 628 555-0123
Within the US / Canada1 628 555-0123
Locally (same area)628 555-0123

Cities in the 628 area code

A 628 number is usually in one of these places in California — 2 counties.

Novato MarinSan Anselmo MarinSan Rafael MarinSouth San Francisco San Mateo

Other California area codes

209213279310323341350357369408415424442510530559

Frequently asked questions

Where is the 628 area code?

The 628 area code is in San Francisco, California, United States (Pacific (PT)).

Is 628 an overlay area code?

Yes. 628 overlays the same region as 415, so callers dial all 10 digits.

Do I have to dial 10 digits for 628?

Yes — dial the area code plus the seven-digit number.

How do I call a 628 number from another country?

Dial your exit code (or +), then 1, then 628, then the number: +1 628 555-0123.

Source: NANPA numbering plan. An area code covers a region, not a precise address — a 628 number does not pinpoint a street or ZIP code.

Missed a call from +1 628?

In the 30 days to September 24, 2026, 280 unwanted calls showing a 628 number were reported to the US Federal Trade Commission, 57% of them recorded messages or robocalls. That puts 628 at #297 of 670 area codes reported.

Other121
Calls pretending to be government, businesses, or family and friends59
Reducing your debt (credit cards, mortgage, student loans)47
Dropped call or no message26
Before you call back
  • If you do not know anyone in California, do not call back: a genuine caller will leave a message or send a text.
  • Scammers fake the number shown on caller ID, so a 628 number can hide a caller anywhere in the world.
  • Never give a code received by text or a bank detail to an unknown caller. In the US, calls can be reported at reportfraud.ftc.gov.

Who issues +1 628 numbers

Phone companies hold blocks of numbers in each area code. The main holders in 628:

Fractel, LLC 33Onvoy, LLC 32T-Mobile USA, Inc. 28Teleport Communications America, LLC 17Bandwidth.Com CLEC, LLC 13New Cingular Wireless PCS, LLC 12

About 23.6% of the 208 prefixes in use belong to mobile carriers: a 628 number is often a cell phone, and it may have moved to another carrier since.

Sources: FTC Do Not Call reported calls (numbers as reported by consumers, not verified), NANPA central office code assignments.

All US area codes United States +1 Map of area code 628 — cities & rate centres