| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (240) 244-10** | (240) 244-1003 - (240) 244-1099 | 90 |
| (240) 244-11** | (240) 244-1100 - (240) 244-1199 | 91 |
| (240) 244-12** | (240) 244-1201 - (240) 244-1299 | 83 |
| (240) 244-13** | (240) 244-1300 - (240) 244-1399 | 89 |
| (240) 244-14** | (240) 244-1400 - (240) 244-1499 | 89 |
| (240) 244-15** | (240) 244-1500 - (240) 244-1599 | 92 |
| (240) 244-16** | (240) 244-1600 - (240) 244-1699 | 91 |
| (240) 244-17** | (240) 244-1700 - (240) 244-1799 | 90 |
| (240) 244-18** | (240) 244-1800 - (240) 244-1899 | 84 |
| (240) 244-19** | (240) 244-1900 - (240) 244-1975 | 57 |
US Phone Directory: (240) 244-1***
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