| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 725-50** | (301) 725-5000 - (301) 725-5099 | 80 |
| (301) 725-51** | (301) 725-5100 - (301) 725-5199 | 73 |
| (301) 725-52** | (301) 725-5200 - (301) 725-5299 | 75 |
| (301) 725-53** | (301) 725-5300 - (301) 725-5399 | 65 |
| (301) 725-54** | (301) 725-5400 - (301) 725-5499 | 71 |
| (301) 725-55** | (301) 725-5500 - (301) 725-5599 | 68 |
| (301) 725-56** | (301) 725-5601 - (301) 725-5699 | 70 |
| (301) 725-57** | (301) 725-5700 - (301) 725-5799 | 74 |
| (301) 725-58** | (301) 725-5800 - (301) 725-5899 | 81 |
| (301) 725-59** | (301) 725-5900 - (301) 725-5996 | 69 |
US Phone Directory: (301) 725-5***
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