| Locality | Post Code |
|---|---|
| Allendale, Solano | 95688 |
| American Canyon, Solano | 94589 |
| Benicia, Solano | 94510 |
| Birds Landing, Solano | 94512 |
| Dixon, Solano | 95620 |
| Elmira, Solano | 95625 |
| Fairfield, Solano | 94533, 94534 |
| Liberty Farms, Solano | 95620 |
| Mare Island, Solano | 94592 |
| Rio Vista, Solano | 94571 |
| Suisun, Solano | 94534, 94585 |
| Suisun City, Solano | 94585 |
| Travis Air Force Base, Solano | 94535 |
| Vacaville, Solano | 95687, 95688, 95696 |
| Vallejo, Solano | 94589, 94590, 94591, 94592 |