Crystal mountain Area Code
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Crystal mountain, MI area code
Crystal mountain, MI is served by area code 231. This area code was initially assigned on 11-MAR-99 and has been in continuous service since 05-JUN-99, supporting the city's growing communication needs over the years.
| City Name | Crystal mountain, MI |
| Area Code | 231 |
| State | Michigan |
| Country | United State |
| Time Zone | Eastern Standard Time (EST) |
| Code Type | General Purpose Code |
| In Service | Yes |
| Assignment Date | 11-MAR-99 |
| In Service Date | 05-JUN-99 |
