| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 437-00** | (301) 437-0000 - (301) 437-0093 | 16 |
| (301) 437-01** | (301) 437-0100 - (301) 437-0185 | 16 |
| (301) 437-02** | (301) 437-0201 - (301) 437-0298 | 15 |
| (301) 437-03** | (301) 437-0302 - (301) 437-0397 | 21 |
| (301) 437-04** | (301) 437-0406 - (301) 437-0498 | 12 |
| (301) 437-05** | (301) 437-0525 - (301) 437-0599 | 8 |
| (301) 437-06** | (301) 437-0608 - (301) 437-0698 | 13 |
| (301) 437-07** | (301) 437-0702 - (301) 437-0793 | 19 |
| (301) 437-08** | (301) 437-0811 - (301) 437-0895 | 13 |
| (301) 437-09** | (301) 437-0900 - (301) 437-0997 | 18 |
US Phone Directory: (301) 437-0***
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