| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 352-70** | (301) 352-7002 - (301) 352-7099 | 64 |
| (301) 352-71** | (301) 352-7100 - (301) 352-7197 | 64 |
| (301) 352-72** | (301) 352-7201 - (301) 352-7299 | 66 |
| (301) 352-73** | (301) 352-7300 - (301) 352-7398 | 55 |
| (301) 352-74** | (301) 352-7401 - (301) 352-7497 | 65 |
| (301) 352-75** | (301) 352-7500 - (301) 352-7599 | 58 |
| (301) 352-76** | (301) 352-7600 - (301) 352-7699 | 66 |
| (301) 352-77** | (301) 352-7700 - (301) 352-7798 | 80 |
| (301) 352-78** | (301) 352-7800 - (301) 352-7896 | 66 |
| (301) 352-79** | (301) 352-7900 - (301) 352-7998 | 69 |
US Phone Directory: (301) 352-7***
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