| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (240) 455-70** | (240) 455-7001 - (240) 455-7099 | 86 |
| (240) 455-71** | (240) 455-7101 - (240) 455-7199 | 75 |
| (240) 455-72** | (240) 455-7200 - (240) 455-7299 | 88 |
| (240) 455-73** | (240) 455-7300 - (240) 455-7399 | 90 |
| (240) 455-74** | (240) 455-7400 - (240) 455-7499 | 86 |
| (240) 455-75** | (240) 455-7500 - (240) 455-7599 | 87 |
| (240) 455-76** | (240) 455-7601 - (240) 455-7699 | 87 |
| (240) 455-77** | (240) 455-7700 - (240) 455-7799 | 92 |
| (240) 455-78** | (240) 455-7802 - (240) 455-7898 | 86 |
| (240) 455-79** | (240) 455-7900 - (240) 455-7999 | 83 |
US Phone Directory: (240) 455-7***
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