Area code
Area code 628 — San Francisco, CA
California · in service since March 21, 2015
Area code 628 covers the San Francisco, CA area. It is an overlay: 415 serves the same area, so neighbors can have different area codes.
Overlay, same area: 415
Local time in San Francisco
Spam reports from Sep 23 – Oct 22, 2026
Average #250 of 461 codes
361 FTC complaints
Consumer reports, not verified by the FTC.
See the reports- Time zonePacific Time
- Local calls1 + 10 digits
- Prefixes208 assigned
- Runs out~4Q 2072
- Unwanted call?Block & report
Spam call reports about 628 numbers
Complaints by week
Sep 11 – Oct 22, 2026Show as table
| Week starting | Complaints |
|---|---|
| Sep 7 (3 days) | 21 |
| Sep 14 | 78 |
| Sep 21 | 102 |
| Sep 28 | 85 |
| Oct 5 | 68 |
| Oct 12 | 77 |
| Oct 19 (4 days) | 61 |
Compared with all codes
- Robocalls
- 60%all codes 75%
- Callers with the same code
- 4%all codes 35%
- Rank by complaints
- #250of 461 · middle half
- FCC complaints, Oct 2025 – Sep 2026
- 706 about text messages
What the calls were about
Sep 11 – Oct 22, 2026
| Subject | Complaints | |
|---|---|---|
| Reducing your debt (credit cards, mortgage, student loans) | 109 22% | |
| Calls pretending to be government, businesses, or family and friends | 105 21% | |
| Dropped call or no message | 44 9% | |
| Medical & prescriptions | 9 2% | |
| Computer & technical support | 3 1% | |
| Energy, solar, & utilities | 3 1% |
Where the people who complained live
Sep 11 – Oct 22, 2026
| State | Complaints | |
|---|---|---|
| California | 153 31% | |
| New York | 32 7% | |
| Texas | 30 6% | |
| New Jersey | 22 4% | |
| Florida | 18 4% |
October 2026 (partial) report · most reported
Consumer reports, not verified by the FTC · source
Source: FTC Do Not Call complaints created Sep 11 – Oct 22, 2026. They are reported by consumers and are not verified by the FTC; caller ID can be spoofed (how we count).
Source: FCC Consumer Complaints data, unwanted calls filed Oct 1, 2025 – Sep 30, 2026, by caller ID; not verified by the FCC.
Area code 628 location and prefixes
| Exchange (NANPA) | Place | County | Prefixes |
|---|---|---|---|
| SNFC CNTRL | San Francisco | San Francisco County | 76 |
| SNFC MT-EV | San Francisco | San Francisco County | 26 |
| SAN RAFAEL | San Rafael | Marin County | 17 |
| SNFC JUNPR | San Francisco | San Francisco County | 14 |
| BELVEDERE | Belvedere | Marin County | 10 |
| CORTEMADRA | Corte Madera | Marin County | 7 |
| MILLVALLEY | Mill Valley | Marin County | 7 |
| NOVATO | Novato | Marin County | 7 |
| SAUSALITO | Sausalito | Marin County | 7 |
| IGNACIO | — | — | 6 |
Plus 4 smaller exchange areas.
Source: NANPA CO codes of Oct 23, 2026; places: U.S. Census Bureau, matched by DialWhere (how).
NANPA record
- Location
- California
- Assigned by NANPA
- December 19, 2013
- Local dialing
- 1 + 10 digits (NANPA: 1+10D)
- NANPA planning letters
- PL-461
Source: NANPA, NPA database of Oct 24, 2026.
Is 628 running out of numbers?
Previous forecast (October 2025): 2065, moved later by 7 years.
Forecast exhaust year by edition
Source: NANPA NRUF forecast, April 2026 edition.
Who holds 628 prefixes
The five largest of 34 original holders
As listed by NANPA, not today’s carrier.
| Holder (as listed) | Prefixes | |
|---|---|---|
| Fractel, LLC | 33 16% | |
| Onvoy, LLC | 32 15% | |
| T-Mobile USA, Inc. | 28 13% | |
| Teleport Communications America, LLC | 17 8% | |
| Bandwidth.com CLEC, LLC | 13 6% |
Source: NANPA CO codes of Oct 23, 2026.
Questions about area code 628
What area code is 628?
A California area code, in service since March 21, 2015.
Where is 628 area code, and what time zone is it in?
San Francisco, CA; Pacific Time.
Why am I getting spam calls from 628?
361 FTC complaints from Sep 23 – Oct 22, 2026, most often about debt reduction (not verified by the FTC; caller ID can be spoofed).
Will 628 get a new area code?
NANPA forecasts exhaust in 4Q 2072; no relief planning listed.