Frontier zipcode
| City | Frontier |
| ZIP Code | 49239 |
| Type | PO Box |
| State Code | MI |
| State | Michigan |
ZIP code of Frontier is 49239. This place is located in Michigan state in US. To send any postal service to Frontier, you must use 49239 zipcode.
| City | Frontier |
| ZIP Code | 49239 |
| Type | PO Box |
| State Code | MI |
| State | Michigan |
ZIP code of Frontier is 49239. This place is located in Michigan state in US. To send any postal service to Frontier, you must use 49239 zipcode.
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