| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 442-50** | (301) 442-5003 - (301) 442-5070 | 3 |
| (301) 442-51** | (301) 442-5110 - (301) 442-5185 | 8 |
| (301) 442-52** | (301) 442-5214 - (301) 442-5295 | 4 |
| (301) 442-53** | (301) 442-5302 - (301) 442-5399 | 11 |
| (301) 442-54** | (301) 442-5402 - (301) 442-5485 | 4 |
| (301) 442-55** | (301) 442-5513 - (301) 442-5598 | 18 |
| (301) 442-56** | (301) 442-5600 - (301) 442-5697 | 16 |
| (301) 442-57** | (301) 442-5702 - (301) 442-5799 | 19 |
| (301) 442-58** | (301) 442-5802 - (301) 442-5893 | 10 |
| (301) 442-59** | (301) 442-5901 - (301) 442-5990 | 8 |
US Phone Directory: (301) 442-5***
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