| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 755-50** | (301) 755-5000 - (301) 755-5099 | 77 |
| (301) 755-51** | (301) 755-5100 - (301) 755-5197 | 87 |
| (301) 755-52** | (301) 755-5200 - (301) 755-5299 | 63 |
| (301) 755-53** | (301) 755-5300 - (301) 755-5399 | 80 |
| (301) 755-54** | (301) 755-5400 - (301) 755-5499 | 78 |
| (301) 755-55** | (301) 755-5500 - (301) 755-5599 | 83 |
| (301) 755-56** | (301) 755-5600 - (301) 755-5699 | 84 |
| (301) 755-57** | (301) 755-5700 - (301) 755-5798 | 86 |
| (301) 755-58** | (301) 755-5800 - (301) 755-5898 | 68 |
| (301) 755-59** | (301) 755-5900 - (301) 755-5999 | 74 |
US Phone Directory: (301) 755-5***
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