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| Raw Number | 231604 |
| Basic Format | 231-604 |
| NPA (Area Code) | 231 |
| NXX | 604 |
| NPA-NXX-X | OCN | Company | Rate Center | Use Type | State |
|---|---|---|---|---|---|
| 231-604-XXXX | 6630 | SPOK, INC. | KALKASKA | AS | MI |
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