| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (240) 342-20** | (240) 342-2004 - (240) 342-2099 | 70 |
| (240) 342-21** | (240) 342-2100 - (240) 342-2199 | 84 |
| (240) 342-22** | (240) 342-2200 - (240) 342-2299 | 88 |
| (240) 342-23** | (240) 342-2300 - (240) 342-2398 | 85 |
| (240) 342-24** | (240) 342-2400 - (240) 342-2499 | 85 |
| (240) 342-25** | (240) 342-2500 - (240) 342-2598 | 83 |
| (240) 342-26** | (240) 342-2600 - (240) 342-2699 | 76 |
| (240) 342-27** | (240) 342-2700 - (240) 342-2798 | 53 |
| (240) 342-28** | (240) 342-2800 - (240) 342-2840 | 3 |
| (240) 342-29** | (240) 342-2943 - (240) 342-2949 | 3 |
US Phone Directory: (240) 342-2***
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