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Area code 628

Area code 628 San Francisco, California

Area code 628 is one of the newer area codes, added in 2015 to California, with numbers assigned in San Francisco, San Rafael, Belvedere and 8 more places. It’s 9:11 PM there now.

State
California41 area codes in California
Time zone
Pacific9:11 PM there now
Exchanges
19311 places
Overlay
415Same area, 10-digit dialing
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Where area code 628 is

Numbers in 628 are assigned to 11 places in 3 counties: San Francisco County, Marin County and Merced County.

San Francisco holds most of them: 60% of the exchanges.

  • San Francisco116
  • San Rafael17
  • Belvedere10
  • Novato7
  • Corte Madera7
  • Mill Valley7
  • Sausalito7
  • Nicasio5
  • Inverness4
  • Point Reyes Station4
  • Stevinson3

Phone companies in 628

193 blocks of numbers in 628 are held by 31 phone companies. The most belong to Fractel (33), Inteliquent (32) and T-Mobile (29).

A large share, about 71%, belongs to competitive and internet phone carriers; wireless networks hold 26% and local phone and cable companies 3%.

A block’s holder is the company it was first assigned to; numbers can move to other carriers since.

History and overlays

628 went into service in 2015, added to the area of 415.

415 (since 1947) shares the same area, so a new number there can get any of these codes and local calls are dialed with all 10 digits.

70 new exchanges were assigned since 2021, the latest in June 2026.

Calling 628

It’s 9:11 PM Pacific time in 628 right now.

From elsewhere in the U.S., dial 1, 628 and the 7-digit number; inside the area, all 10 digits too.

Nearby area codes

California has 41 area codes: 209, 213, 279, 310, 323, 341, 350, 357, 369, 408, 415, 424, 442, 510, 530, 559, 562, 619, 626, 628, 650, 657, 661, 669, 707, 714, 738, 747, 760, 805, 818, 820, 831, 837, 840, 858, 909, 916, 925, 949 and 951.

From the North American Numbering Plan Administrator’s area code and exchange records (10/22/2026) and U.S. Census place and county names. Places and companies are where number blocks were assigned, not where anyone lives or which carrier a number uses today.

Map of the 628 area code

Map of the 628 area code around San Francisco, San Rafael and Belvedere, California.

Interactive map © OpenStreetMap contributors

Cities on the map

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Questions about 628

Where is area code 628?

In California, covering San Francisco, San Rafael and Belvedere and other places across 3 counties.

What time zone is 628 in?

Pacific time. It was 9:11 PM there when this page loaded.

Is 628 an overlay?

Yes. 415 serves the same area, so dial all 10 digits for local calls.

Which phone companies have 628 numbers?

31 companies hold blocks; the most belong to Fractel, Inteliquent and T-Mobile. About 26% of blocks are wireless.

Is 628 running out of numbers?

Not on record. 70 new exchanges have been assigned since 2021.