| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Akai Nyo, Okiuso | 521106 |
| Postal/ZIP Codes in Isa Okiuso, Okiuso | 521106 |
| Postal/ZIP Codes in Itak Okiuso, Okiuso | 521106 |
| Postal/ZIP Codes in Udung Afiang, Okiuso | 521106 |
| Postal/ZIP Codes in Udung Amkpe, Okiuso | 521106 |
| Postal/ZIP Codes in Udung Ukpong, Okiuso | 521106 |
| Postal/ZIP Codes in Udung Ulo, Okiuso | 521106 |
| Postal/ZIP Codes in Udung Umo, Okiuso | 521106 |