| Place | Post Code |
|---|---|
| Araba, Otso | None |
| Aru, Otso | None |
| Azanga, Otso | None |
| Ediofe, Otso | None |
| Ngele, Otso | None |
| Nguotse, Otso | None |
| Niambere, Otso | None |
| Ondia, Otso | None |
| Osi, Otso | None |
| Vurra, Otso | None |
| All postal codes in Aru | |
|---|---|
| Aluru, Aru | |
| Kakwa, Aru | |
| Kaliko-Omi, Aru | |
| Lu, Aru | |
| Ndo-Okebo, Aru | |
| Nio-Kamule, Aru | |
| Otso, Aru | |
| Zaki, Aru | |