| District of California area codes: 858 | |
|---|---|
| Country | United States |
| State/Province | California |
| Major City | San Diego |
| Time Zone | Pacific |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 858-952 | San Diego | La Jolla, CA | Level 3 Communications |
| 858-956 | San Diego | Poway, CA | Pac - West Telecomm |
| 858-964 | San Diego | San Diego, CA | Paetec Communications |
| 858-966 | San Diego | San Diego, CA | Pacific Bell |
| 858-967 | San Diego | San Diego, CA | Sprint Spectrum L.p. |
| 858-974 | San Diego | San Diego, CA | Pacific Bell |
| 858-997 | San Diego | La Jolla, CA | Cellco Partnership DBA Verizon Wireless |
| 858-999 | San Diego | San Diego, CA | Cf Communications DBA Telekenex |
| 858-555 | Used in movie | La Jolla, CA | Used in movie |
There are 389 prefixes, In the code area, the major cities are Poway, CA. The major city is San Diego.