A1C 1S4 is Canadian Postal Code located in Downtown Newfoundland and Labrador.
| Postal Code | A1C 1S4 |
| Forward Sortation Area | A1C |
| Name | Downtown |
| Province | Newfoundland and Labrador |
| Administrative Division | Division No. 1 |
| City | St. John's |
| Timezone | (NDT) |
| Area Code(s) | 709 |