| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 316-51** | (301) 316-5150 - (301) 316-5198 | 15 |
| (301) 316-52** | (301) 316-5246 - (301) 316-5299 | 23 |
| (301) 316-53** | (301) 316-5336 - (301) 316-5393 | 12 |
| (301) 316-54** | (301) 316-5440 - (301) 316-5493 | 26 |
| (301) 316-56** | (301) 316-5642 - (301) 316-5699 | 25 |
| (301) 316-57** | (301) 316-5755 - (301) 316-5794 | 13 |
| (301) 316-58** | (301) 316-5820 - (301) 316-5889 | 10 |
| (301) 316-59** | (301) 316-5950 - (301) 316-5999 | 10 |
US Phone Directory: (301) 316-5***
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