| Place | Post Code |
|---|---|
| Firestone/Check Point, Siahn | None |
| Gardiah, Siahn | None |
| Glanyon, Siahn | None |
| Jay, Siahn | None |
| Kataly, Siahn | None |
| Momwolo, Siahn | None |
| Saywheowor, Siahn | None |
| All postal codes in Fen River | |
|---|---|
| Boewein Toba, Fen River | |
| Borbor, Fen River | |
| Dowein, Fen River | |
| Kebeh/Hwolozohn, Fen River | |
| Siahn, Fen River | |
| Teekpeh, Fen River | |