| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 237-50** | (301) 237-5005 - (301) 237-5094 | 10 |
| (301) 237-51** | (301) 237-5108 - (301) 237-5191 | 9 |
| (301) 237-52** | (301) 237-5244 - (301) 237-5297 | 5 |
| (301) 237-53** | (301) 237-5311 - (301) 237-5381 | 3 |
| (301) 237-54** | (301) 237-5406 - (301) 237-5498 | 12 |
| (301) 237-55** | (301) 237-5534 - (301) 237-5561 | 5 |
| (301) 237-56** | (301) 237-5602 - (301) 237-5698 | 8 |
| (301) 237-57** | (301) 237-5703 - (301) 237-5787 | 11 |
| (301) 237-58** | (301) 237-5815 - (301) 237-5896 | 6 |
| (301) 237-59** | (301) 237-5922 - (301) 237-5995 | 10 |
US Phone Directory: (301) 237-5***
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