| Place | Post Code |
|---|---|
| Udomi, Irrua | 310112 |
| Udowo, Irrua | 310112 |
| Ugbokhare, Irrua | 310112 |
| Ughalo, Irrua | 310112 |
| Ughenokhua, Irrua | 310112 |
| Uhaekpen, Irrua | 310112 |
| Ujabhole, Irrua | 310112 |
| Uneah, Irrua | 310112 |
| Usenu, Irrua | 310112 |
| Uwessan, Irrua | 310112 |
| Uzebu, Irrua | 310112 |
| 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 | |