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United States > Michigan > Shelby > Area Code 231
| Area Code: | 231 |
| State: | Michigan |
| City: | Shelby |
| Country: | United States |
Supported Exchanges in Area Code 231
| Exchange | County | Carrier |
|---|---|---|
| 231-259 | Oceana | |
| 231-614 | Oceana | Lucre, Inc. |
| 231-731 | Oceana | Lucre, Inc. |
| 231-861 | Oceana | Level 3 Communications, Llc - |