| Place | Post Code |
|---|---|
| Idomu-Arebun, Ewossa | 310120 |
| Idomu-Iyase, Ewossa | 310120 |
| Idumu-Ojewa, Ewossa | 310120 |
| Idumu-Oweran, Ewossa | 310120 |
| All postal codes in Esan Central | |
|---|---|
| Ebelle, Esan Central | |
| Ewossa, Esan Central | |
| Ewu, Esan Central | |
| Igueben, Esan Central | |
| Irrua, Esan Central | |
| Opoji, Esan Central | |
| Ugbegun, Esan Central | |