| Locality | Post Code |
|---|---|
| Manriki, Nikunau | |
| Muribenua, Nikunau | |
| Nikumanu, Nikunau | |
| Rungata, Nikunau | |
| Tabomatang, Nikunau | |
| Tabutoa, Nikunau |
| Gilbert Islands Postal Codes | |
|---|---|
| Tamana | South Tarawa |
| South Tabiteuea | Onotoa |
| North Tarawa | North Tabiteuea |
| Nonouti | Nikunau |
| Marakei | Makin |
| Maiana | Kuria |
| Butaritari | Beru |
| Banaba | Arorae |
| Aranuka | Abemama |
| Abaiang | |