| Ort | Postleitzahl |
|---|---|
| 平谷村一円 (Hirayamuraichien, Nagano) | 395-0601 |
| Postleitzahlen in Shimoina | |
|---|---|
| Anan (阿南町) | |
| Matsukawa (松川町) | |
| Takamori (高森町) | |
| Achi (阿智村) | |
| Hiraya (平谷村) | |
| Neba (根羽村) | |
| Oshika (大鹿村) | |
| Shimojo (下條村) | |
| Takagi (喬木村) | |
| Tenryu (天龍村) | |
| Toyoka (豊丘村) | |
| Urugi (売木村) | |
| Yasuoka (泰阜村) | |