| Postal Code information | |
|---|---|
| Place | Bắc Sơn |
| Post Code | 433301, 433302, 433303, 433304, 433305, 433306, 433307, 433308, 433309, 433310, 433311, 433312, 433313, 433314, 433315, 433316, 433317, 433318, 433319, 433320, 433321 |
| County | Bắc Sơn |
| State | Đồng Bằng Sông Hồng |
| Time zone | Asia/Ho_Chi_Minh |