| Place | Post Code |
|---|---|
| Afikpo Road, Ishiagu | 491105 |
| Amaeke, Ishiagu | 491105 |
| Amaeze, Ishiagu | 491105 |
| Amagu, Ishiagu | 491105 |
| Amaokwe, Ishiagu | 491105 |
| Amaonye, Ishiagu | 491105 |
| Amata, Ishiagu | 491105 |
| Eziato, Ishiagu | 491105 |
| Ihiali, Ishiagu | 491105 |
| Ihie I, Ishiagu | 491105 |
| Ihietutu, Ishiagu | 491105 |
| Nguogwo, Ishiagu | 491105 |
| Nzerem, Ishiagu | 491105 |
| Obinagu, Ishiagu | 491105 |
| Ogwor, Ishiagu | 491105 |
| Okue, Ishiagu | 491105 |
| All postal codes in Ohaozara | |
|---|---|
| Akaeze, Ohaozara | |
| Ishiagu, Ohaozara | |
| Okoposi, Ohaozara | |
| Uburu, Ohaozara | |
| Ugwu-Langwu, Ohaozara | |