| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 904-50** | (301) 904-5026 - (301) 904-5089 | 8 |
| (301) 904-51** | (301) 904-5111 - (301) 904-5197 | 26 |
| (301) 904-52** | (301) 904-5200 - (301) 904-5295 | 27 |
| (301) 904-53** | (301) 904-5304 - (301) 904-5398 | 32 |
| (301) 904-54** | (301) 904-5402 - (301) 904-5496 | 24 |
| (301) 904-55** | (301) 904-5506 - (301) 904-5599 | 23 |
| (301) 904-56** | (301) 904-5602 - (301) 904-5693 | 32 |
| (301) 904-57** | (301) 904-5706 - (301) 904-5798 | 30 |
| (301) 904-58** | (301) 904-5800 - (301) 904-5897 | 24 |
| (301) 904-59** | (301) 904-5905 - (301) 904-5973 | 20 |
US Phone Directory: (301) 904-5***
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