| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 938-50** | (301) 938-5002 - (301) 938-5076 | 23 |
| (301) 938-51** | (301) 938-5103 - (301) 938-5183 | 22 |
| (301) 938-52** | (301) 938-5209 - (301) 938-5289 | 21 |
| (301) 938-53** | (301) 938-5300 - (301) 938-5396 | 37 |
| (301) 938-54** | (301) 938-5400 - (301) 938-5496 | 24 |
| (301) 938-55** | (301) 938-5505 - (301) 938-5591 | 21 |
| (301) 938-56** | (301) 938-5602 - (301) 938-5673 | 15 |
| (301) 938-57** | (301) 938-5721 - (301) 938-5797 | 26 |
| (301) 938-58** | (301) 938-5800 - (301) 938-5897 | 25 |
| (301) 938-59** | (301) 938-5900 - (301) 938-5998 | 36 |
US Phone Directory: (301) 938-5***
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