| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (240) 788-70** | (240) 788-7000 - (240) 788-7099 | 84 |
| (240) 788-71** | (240) 788-7100 - (240) 788-7198 | 75 |
| (240) 788-72** | (240) 788-7200 - (240) 788-7299 | 81 |
| (240) 788-73** | (240) 788-7300 - (240) 788-7399 | 80 |
| (240) 788-74** | (240) 788-7400 - (240) 788-7499 | 84 |
| (240) 788-75** | (240) 788-7500 - (240) 788-7599 | 81 |
| (240) 788-76** | (240) 788-7602 - (240) 788-7699 | 84 |
| (240) 788-77** | (240) 788-7700 - (240) 788-7799 | 77 |
| (240) 788-78** | (240) 788-7800 - (240) 788-7899 | 76 |
| (240) 788-79** | (240) 788-7900 - (240) 788-7999 | 80 |
US Phone Directory: (240) 788-7***
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