B1B 1R3 is Canadian Postal Code located in Round Island Nova Scotia.
| Postal Code | B1B 1R3 |
| Forward Sortation Area | B1B |
| Name | Round Island |
| Province | Nova Scotia |
| Administrative Division | Cape Breton Regional Municipality |
| Timezone | (ADT) |
| Area Code(s) | 782 / 902 |