X1A 3B4 is Canadian Postal Code located in Yellowknife Northwest Territories.
| Postal Code | X1A 3B4 |
| Forward Sortation Area | X1A |
| Name | Yellowknife |
| Province | Northwest Territories |
| Administrative Division | Fort Smith Region |
| Timezone | Mountain Daylight Time (MDT) |
| Area Code(s) | 867 |