Area code 628 covers San Francisco and surrounding areas in California. It was activated in 2015 as an overlay of area code 415. Today it shares its territory with overlay code 415. For the full picture, see all California area codes.
| State | California |
|---|---|
| Primary city | San Francisco |
| Cities also served | San Francisco, San Rafael, Daly City, Mill Valley, Sausalito, Novato, Tiburon, Corte Madera |
| Time zone | Pacific (UTC-8 / UTC-7 DST) |
| Year established | March 21, 2015 |
| Original 1947 NPA? | No |
| Parent code | 415 |
| Overlay codes | 415 |
| Currently in use? | Yes, actively assigned |
| Ten-digit dialing required? | Yes |
628 as an Overlay of 415
Area code 628 is an overlay of area code 415, meaning the two codes share the exact same geographic territory in City and County of San Francisco, majority of Marin County, and a small portion of San Mateo County. When 628 was activated in March 21, 2015, all existing 415 phone numbers stayed unchanged. New phone lines in the region may now be assigned either 415 or 628, and ten-digit dialing is required for all local calls. For the full history of the area, its cities, and what these codes mean culturally, see our page on area code 415.
Cities Served by Area Code 628
Area code 628 serves City and County of San Francisco, majority of Marin County, and a small portion of San Mateo County, including the following cities and communities:
- San Francisco
- San Rafael
- Daly City
- Mill Valley
- Sausalito
- Novato
- Tiburon
- Corte Madera
Nearby area codes covering the same broader region include: 415, 650, 510, 341, 707, 369.
How to Get a 628 Phone Number
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Browse 628 Numbers →There are three ways to get a phone number with the 628 area code, each suited to a different need:
- Buy from a premium-number specialist. Companies that hold curated inventories of specific area codes can sell you a 628 number directly, often with a one-time fee and ownership transferred to you (no recurring carrier fees). This is the option for picking a specific memorable number, or for getting an area code that most carriers won’t let you request. Browse our 628 inventory.
- Sign up with a VoIP carrier. Voice-over-IP services (such as Google Voice, OpenPhone, Grasshopper, and many others) can typically provision a 628 number on request, especially for active overlay codes. You won’t usually get to pick the specific number, but you’ll get a working line in the area code. This is the cheapest option for anyone who doesn’t need a particular number.
- Port an existing 628 number. If you already have a 628 phone number with another carrier, you can transfer it (port it) to a new service provider while keeping the number. This works for landlines, cell phones, and VoIP services, though landlines outside of California sometimes can’t accept inbound ports of 628 numbers due to 911 routing rules.
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Frequently Asked Questions
Is the 628 area code still in use?
Yes. 628 is actively assigned to new phone lines in City and County of San Francisco, majority of Marin County, and a small portion of San Mateo County.
What is the difference between 628 and 415?
Today they share the same geographic territory in California. New phone lines in the area may be assigned either code. The two codes work identically for calling, billing, and service.
What is the parent area code of 628?
Area code 628 is an overlay of 415. Both codes serve the same region of California.
Can I get a 628 number if I don't live in California?
Yes. Phone numbers are no longer tied to a physical address. With VoIP service or a number broker, you can hold a 628 number from anywhere in the world. The number routes to whatever device or carrier you specify.
Is 628 a scam area code?
No. 628 is a legitimate, active area code for City and County of San Francisco, majority of Marin County, and a small portion of San Mateo County. Like any area code, scammers occasionally spoof 628 caller IDs, but the code itself is heavily used by real California businesses, government offices, and residents.
What cities does the 628 area code serve?
Area code 628 serves San Francisco, San Rafael, Daly City, Mill Valley, Sausalito, Novato, Tiburon, Corte Madera, and other communities in Marin County and a small portion of San Mateo County.
Is 628 a new area code or a split?
It is an overlay, not a split. Area code 628 was added on March 21, 2015, to the same geographic territory already served by area code 415. Existing 415 customers kept their numbers; 628 was assigned to new lines.
Do I have to dial ten digits when calling a 628 number?
Yes. Because 628 overlays 415, all local calls in the area require ten-digit dialing (area code + seven-digit number).
Why was area code 628 created?
The California Public Utilities Commission approved 628 in December 2014 to address exhaustion of available prefixes in the 415 numbering plan area, driven by population and business growth in the San Francisco Bay Area.
