| District of California area codes: 415 | |
|---|---|
| Country | United States |
| State/Province | California |
| Major City | San Francisco |
| Time Zone | Pacific (UTC-08:00) |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 415-223 | Marin | San Rafael, CA | Pac - West Telecomm |
| 415-224 | San Francisco | San Francisco, CA | Usa Mobility Wireless |
| 415-225 | San Mateo | Brisbane, CA | Sprint Spectrum L.p. |
| 415-226 | Marin | San Rafael, CA | Global Crossing Local Services-ca |
| 415-227 | San Francisco | San Francisco, CA | Pacific Bell |
| 415-228 | San Francisco | San Francisco, CA | Mcimetro Access Transmission Services LLC |
| 415-229 | San Francisco | San Francisco, CA | Teleport Communications Group - San Francisco |
| 415-230 | San Francisco | San Francisco, CA | Broadvox-clec |
| 415-231 | San Francisco | San Francisco, CA | T-mobile Usa |
| 415-232 | San Francisco | San Francisco, CA | American Messaging (am) |
| 415-233 | Marin | San Rafael, CA | Level 3 Communications |
| 415-234 | Marin | Ignacio, CA | O1 Communications |
| 415-235 | San Mateo | Brisbane, CA | Sprint Spectrum L.p. |
| 415-236 | Marin | Inverness, CA | Teleport Communications Group - San Francisco |
| 415-237 | Marin | Inverness, CA | Level 3 Communications |
| 415-238 | San Francisco | San Francisco, CA | Cellco Partnership DBA Verizon Wireless |
| 415-239 | San Francisco | San Francisco, CA | Pacific Bell |
| 415-240 | San Francisco | San Francisco, CA | Level 3 Communications |
| 415-241 | San Francisco | San Francisco, CA | Pacific Bell |
| 415-242 | San Francisco | San Francisco, CA | Pacific Bell |
There are 749 prefixes, In the code area, the major cities are Novato, CA;San Anselmo, CA;San Francisco, CA;San R. The major city is San Francisco.