| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 237-00** | (301) 237-0001 - (301) 237-0010 | 5 |
| (301) 237-01** | (301) 237-0103 - (301) 237-0187 | 11 |
| (301) 237-02** | (301) 237-0203 - (301) 237-0297 | 18 |
| (301) 237-03** | (301) 237-0303 - (301) 237-0383 | 11 |
| (301) 237-04** | (301) 237-0405 - (301) 237-0484 | 8 |
| (301) 237-05** | (301) 237-0518 - (301) 237-0559 | 4 |
| (301) 237-06** | (301) 237-0619 - (301) 237-0697 | 10 |
| (301) 237-07** | (301) 237-0705 - (301) 237-0782 | 11 |
| (301) 237-08** | (301) 237-0807 - (301) 237-0899 | 8 |
| (301) 237-09** | (301) 237-0909 - (301) 237-0992 | 5 |
US Phone Directory: (301) 237-0***
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