ZIP Code 49239
| Post Office City | Frontier, MI |
|---|---|
| County | Hillsdale County |
| Area Code | 517 |
| Longitude | -84.6 |
| Latitude | 41.9 |
| Radius | ~11 mile radius |
| Timezone | Eastern |
| Zip Type | PO Box |
| Post Office City | Frontier, MI |
|---|---|
| County | Hillsdale County |
| Area Code | 517 |
| Longitude | -84.6 |
| Latitude | 41.9 |
| Radius | ~11 mile radius |
| Timezone | Eastern |
| Zip Type | PO Box |