Quick answer
415 is the original 1947 San Francisco code and carries the most prestige, but clean numbers are scarce. 628 is the 2015 overlay covering the same SF and Marin area — less status, but far easier to get. Both require 10-digit dialing and are equally local. Pick 415 for prestige, 628 for availability.
415 vs 628 at a glance
| Dimension | 415 | 628 |
|---|---|---|
| Introduced | 1947 (original SF code) | 2015 (overlay) |
| Type | Original geographic code | Overlay on the same area |
| Coverage | San Francisco + Marin County | San Francisco + Marin (identical geography) |
| Prestige signal | High — original SF / Bay Area tech code | Modern San Francisco presence |
| Availability | Scarce (heavily assigned) | Easier — newer code, more inventory |
| Dialing | 10-digit required | 10-digit required |
When to choose 415
Choose 415 when San Francisco prestige matters — a legacy SF business, a Bay Area brand that markets its number, or anyone who wants the recognizable original code. Assigned in 1947, 415 is now heavily used, so clean or memorable 415 numbers are limited and the best patterns go fast.
When 628 is the smart pick
Choose 628 when you want a genuine San Francisco number without hunting for scarce inventory. Introduced in 2015 as the overlay on 415, 628 covers the identical SF and Marin geography and reads as fully local. For most new businesses it is the practical choice — same city, easier to get a clean number.
Why there are two codes for San Francisco
415 and 628 are overlay codes: two area codes stacked on the same region. The 628 overlay was added in 2015 because 415 was running out of numbers — 415 now has roughly 99% of its central-office prefixes assigned. Overlays add numbering capacity without making existing 415 holders renumber — which is why every SF call now uses 10-digit dialing.
How to get a 415 or 628 number with DialPhone
Setting up either as a virtual business number takes under 10 minutes:
- Start a free trial. Any DialPhone plan from $24/user/month — no credit card for the 14-day trial.
- Search 415 or 628 inventory. Filter available San Francisco numbers by code and pattern.
- Configure call handling. Set up the AI receptionist, routing, and business SMS — no hardware.
- Port an existing SF number (optional). Free porting in 2–5 business days with zero downtime.
Related California area code guides
- Read the full 415 area code guide or the 628 area code guide.
- Comparing LA codes too? See 213 vs 323 and 310 vs 424, or the California area codes hub.
415 vs 628 — FAQ
Is 415 better than 628?
Neither is objectively "better" — they cover the same San Francisco geography. 415 carries more prestige as the original 1947 SF code, long associated with the city and Bay Area tech, while 628 (2015) is the newer overlay that is easier to obtain. Choose 415 for status, 628 for availability.
Can I still get a 415 number?
415 is heavily assigned, so clean or vanity 415 numbers are scarce and the best patterns go quickly. 628 has more available inventory because it is the newer overlay. With DialPhone you can search both and pick whichever has the number you want.
Are 415 and 628 the same area?
Yes. 415 and 628 are overlay codes serving the identical area — San Francisco and Marin County. A 628 number is just as local to SF as a 415 number; the difference is age and prestige, not location.
Do I dial 415 and 628 numbers differently?
No. Because 415 and 628 overlay the same region, all calls require 10-digit dialing (area code + 7-digit number) regardless of which code you have. From anywhere in the US or Canada you dial 1 + the area code + the number.