| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Khu I, Cao Bằng) | 276201 |
| Postal/ZIP Codes in Khu II, Cao Bằng) | 276202 |
| Postal/ZIP Codes in Khu III, Cao Bằng) | 276203 |
| Postal/ZIP Codes in Khu IV, Cao Bằng) | 276204 |
| Postal/ZIP Codes in Khu IX, Cao Bằng) | 276208 |
| Postal/ZIP Codes in Khu V, Cao Bằng) | 276210 |
| Postal/ZIP Codes in Khu VI, Cao Bằng) | 276205 |
| Postal/ZIP Codes in Khu VII, Cao Bằng) | 276211 |
| Postal/ZIP Codes in Khu VIII, Cao Bằng) | 276209 |
| Postal/ZIP Codes in Khu X, Cao Bằng) | 276206 |
| Postal/ZIP Codes in Khu XI, Cao Bằng) | 276207 |
| Postal/ZIP Codes in Xóm Nà Chùa, Cao Bằng) | 276212 |