| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (810) 721-00** | (810) 721-0000 - (810) 721-0099 | 67 |
| (810) 721-01** | (810) 721-0101 - (810) 721-0198 | 65 |
| (810) 721-02** | (810) 721-0201 - (810) 721-0298 | 71 |
| (810) 721-03** | (810) 721-0300 - (810) 721-0399 | 70 |
| (810) 721-04** | (810) 721-0401 - (810) 721-0499 | 64 |
| (810) 721-05** | (810) 721-0501 - (810) 721-0599 | 68 |
| (810) 721-06** | (810) 721-0600 - (810) 721-0699 | 66 |
| (810) 721-07** | (810) 721-0701 - (810) 721-0798 | 65 |
| (810) 721-08** | (810) 721-0800 - (810) 721-0899 | 69 |
| (810) 721-09** | (810) 721-0901 - (810) 721-0998 | 69 |
US Phone Directory: (810) 721-0***
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