| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (240) 381-70** | (240) 381-7002 - (240) 381-7087 | 15 |
| (240) 381-71** | (240) 381-7103 - (240) 381-7193 | 21 |
| (240) 381-72** | (240) 381-7204 - (240) 381-7288 | 14 |
| (240) 381-73** | (240) 381-7303 - (240) 381-7399 | 15 |
| (240) 381-74** | (240) 381-7400 - (240) 381-7482 | 20 |
| (240) 381-75** | (240) 381-7519 - (240) 381-7599 | 19 |
| (240) 381-76** | (240) 381-7600 - (240) 381-7672 | 15 |
| (240) 381-77** | (240) 381-7709 - (240) 381-7794 | 16 |
| (240) 381-78** | (240) 381-7800 - (240) 381-7898 | 18 |
| (240) 381-79** | (240) 381-7911 - (240) 381-7996 | 16 |
US Phone Directory: (240) 381-7***
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