| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (240) 464-10** | (240) 464-1001 - (240) 464-1094 | 8 |
| (240) 464-11** | (240) 464-1119 - (240) 464-1177 | 4 |
| (240) 464-12** | (240) 464-1230 - (240) 464-1281 | 4 |
| (240) 464-13** | (240) 464-1336 - (240) 464-1392 | 5 |
| (240) 464-14** | (240) 464-1426 - (240) 464-1487 | 4 |
| (240) 464-15** | (240) 464-1510 - (240) 464-1593 | 4 |
| (240) 464-16** | (240) 464-1604 - (240) 464-1642 | 4 |
| (240) 464-17** | (240) 464-1707 - (240) 464-1791 | 5 |
| (240) 464-18** | (240) 464-1824 - (240) 464-1824 | 1 |
| (240) 464-19** | (240) 464-1905 - (240) 464-1955 | 3 |
US Phone Directory: (240) 464-1***
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