| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 877-50** | (301) 877-5081 - (301) 877-5098 | 4 |
| (301) 877-51** | (301) 877-5101 - (301) 877-5198 | 62 |
| (301) 877-52** | (301) 877-5200 - (301) 877-5299 | 59 |
| (301) 877-54** | (301) 877-5400 - (301) 877-5499 | 70 |
| (301) 877-55** | (301) 877-5527 - (301) 877-5577 | 8 |
| (301) 877-56** | (301) 877-5607 - (301) 877-5680 | 3 |
| (301) 877-57** | (301) 877-5700 - (301) 877-5780 | 4 |
| (301) 877-58** | (301) 877-5800 - (301) 877-5886 | 3 |
| (301) 877-59** | (301) 877-5901 - (301) 877-5998 | 65 |
US Phone Directory: (301) 877-5***
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