| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 516-50** | (301) 516-5001 - (301) 516-5090 | 29 |
| (301) 516-51** | (301) 516-5100 - (301) 516-5199 | 62 |
| (301) 516-52** | (301) 516-5206 - (301) 516-5298 | 35 |
| (301) 516-53** | (301) 516-5300 - (301) 516-5398 | 45 |
| (301) 516-54** | (301) 516-5402 - (301) 516-5499 | 67 |
| (301) 516-55** | (301) 516-5500 - (301) 516-5597 | 48 |
| (301) 516-56** | (301) 516-5600 - (301) 516-5699 | 37 |
| (301) 516-57** | (301) 516-5700 - (301) 516-5797 | 46 |
| (301) 516-58** | (301) 516-5801 - (301) 516-5897 | 52 |
| (301) 516-59** | (301) 516-5900 - (301) 516-5999 | 46 |
US Phone Directory: (301) 516-5***
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