| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Dule B, Dule B | 21729 |
| Postal/ZIP Codes in Kilangwi, Dule B | 21729 |
| Postal/ZIP Codes in Kwehangala, Dule B | 21729 |
| Postal/ZIP Codes in Mpalai, Dule B | 21729 |
| Postal/ZIP Codes in Mtunda, Dule B | 21729 |
| Postal/ZIP Codes in Wena, Dule B | 21729 |