| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 545-50** | (301) 545-5001 - (301) 545-5055 | 4 |
| (301) 545-51** | (301) 545-5100 - (301) 545-5199 | 18 |
| (301) 545-53** | (301) 545-5300 - (301) 545-5385 | 3 |
| (301) 545-54** | (301) 545-5438 - (301) 545-5438 | 1 |
| (301) 545-55** | (301) 545-5544 - (301) 545-5560 | 3 |
| (301) 545-56** | (301) 545-5600 - (301) 545-5660 | 3 |
| (301) 545-57** | (301) 545-5711 - (301) 545-5780 | 2 |
| (301) 545-58** | (301) 545-5815 - (301) 545-5815 | 1 |
| (301) 545-59** | (301) 545-5900 - (301) 545-5986 | 3 |
US Phone Directory: (301) 545-5***
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