| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 346-50** | (301) 346-5001 - (301) 346-5090 | 14 |
| (301) 346-51** | (301) 346-5100 - (301) 346-5199 | 13 |
| (301) 346-52** | (301) 346-5203 - (301) 346-5296 | 22 |
| (301) 346-53** | (301) 346-5302 - (301) 346-5399 | 22 |
| (301) 346-54** | (301) 346-5406 - (301) 346-5499 | 18 |
| (301) 346-55** | (301) 346-5501 - (301) 346-5598 | 17 |
| (301) 346-56** | (301) 346-5615 - (301) 346-5695 | 17 |
| (301) 346-57** | (301) 346-5700 - (301) 346-5794 | 14 |
| (301) 346-58** | (301) 346-5800 - (301) 346-5892 | 15 |
| (301) 346-59** | (301) 346-5900 - (301) 346-5985 | 16 |
US Phone Directory: (301) 346-5***
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