| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (240) 731-70** | (240) 731-7000 - (240) 731-7099 | 16 |
| (240) 731-71** | (240) 731-7100 - (240) 731-7192 | 15 |
| (240) 731-72** | (240) 731-7212 - (240) 731-7299 | 24 |
| (240) 731-73** | (240) 731-7300 - (240) 731-7384 | 18 |
| (240) 731-74** | (240) 731-7400 - (240) 731-7496 | 23 |
| (240) 731-75** | (240) 731-7501 - (240) 731-7594 | 18 |
| (240) 731-76** | (240) 731-7600 - (240) 731-7694 | 21 |
| (240) 731-77** | (240) 731-7701 - (240) 731-7799 | 22 |
| (240) 731-78** | (240) 731-7811 - (240) 731-7894 | 21 |
| (240) 731-79** | (240) 731-7901 - (240) 731-7996 | 23 |
US Phone Directory: (240) 731-7***
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