| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Eguare-Udo, Udo | 311105 |
| Postal/ZIP Codes in Eko-Okukpon, Udo | 311105 |
| Postal/ZIP Codes in Eko-Ugbodu, Udo | 311105 |
| Postal/ZIP Codes in Eko-Utomhin, Udo | 311105 |
| Postal/ZIP Codes in Idumhuan-Khinmhin, Udo | 311105 |
| Postal/ZIP Codes in Udo, Udo | 311105 |
| Postal/ZIP Codes in Udo-Neria, Udo | 311105 |