| Place | Post Code |
|---|---|
| Esa Ekpo, Ibiaku | 534109 |
| Ibekwe-Akpan Nya, Ibiaku | 534109 |
| Ibiaku Esa Ekpo, Ibiaku | 534109 |
| Ikot Abasi Akpan, Ibiaku | 534109 |
| Ikot Abia Enin, Ibiaku | 534109 |
| Ikot Aka, Ibiaku | 534109 |
| Ikot-Akpabong, Ibiaku | 534109 |
| Ikot Ata/Nung Ikono, Ibiaku | 534109 |
| Ikot-Ebak, Ibiaku | 534109 |
| Ikot Ekpenyong., Ibiaku | 534109 |
| Ikot Idiong, Ibiaku | 534109 |
| Ikot Itina, Ibiaku | 534109 |
| Ikot Ntot, Ibiaku | 534109 |
| Minya Ntak, Ibiaku | 534109 |
| Ndot/Abat Nya, Ibiaku | 534109 |
| Nya Odiong, Ibiaku | 534109 |
| All postal codes in Mbo | |
|---|---|
| Afaha Okpo, Mbo | |
| Effiat, Mbo | |
| Ibiaku, Mbo | |
| Ikpa Ibom, Mbo | |
| Ikpo Ikono, Mbo | |
| Ukwong, Mbo | |