| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Aduma, Idomi | 543105 |
| Postal/ZIP Codes in Agoi Ibomi, Idomi | 543105 |
| Postal/ZIP Codes in Egbezum, Idomi | 543105 |
| Postal/ZIP Codes in Idomi, Idomi | 543105 |
| Postal/ZIP Codes in Ife Agoi, Idomi | 543105 |
| Postal/ZIP Codes in Iyang-Mkpe, Idomi | 543105 |
| Postal/ZIP Codes in Lekpankom, Idomi | 543105 |
| Postal/ZIP Codes in Loseni, Idomi | 543105 |
| Postal/ZIP Codes in Mkpani, Idomi | 543105 |
| Postal/ZIP Codes in Nfakom, Idomi | 543105 |
| Postal/ZIP Codes in Nsobo, Idomi | 543105 |
| Postal/ZIP Codes in Otalosi, Idomi | 543105 |
| Postal/ZIP Codes in Uden-Okota, Idomi | 543105 |