| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 318-50** | (301) 318-5010 - (301) 318-5084 | 4 |
| (301) 318-51** | (301) 318-5100 - (301) 318-5163 | 10 |
| (301) 318-53** | (301) 318-5306 - (301) 318-5386 | 6 |
| (301) 318-54** | (301) 318-5432 - (301) 318-5490 | 7 |
| (301) 318-55** | (301) 318-5519 - (301) 318-5519 | 1 |
| (301) 318-56** | (301) 318-5621 - (301) 318-5675 | 2 |
| (301) 318-57** | (301) 318-5739 - (301) 318-5757 | 2 |
| (301) 318-58** | (301) 318-5802 - (301) 318-5897 | 6 |
| (301) 318-59** | (301) 318-5901 - (301) 318-5987 | 5 |
US Phone Directory: (301) 318-5***
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