| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (240) 403-20** | (240) 403-2010 - (240) 403-2019 | 2 |
| (240) 403-21** | (240) 403-2107 - (240) 403-2188 | 13 |
| (240) 403-22** | (240) 403-2226 - (240) 403-2275 | 4 |
| (240) 403-24** | (240) 403-2440 - (240) 403-2440 | 1 |
| (240) 403-25** | (240) 403-2520 - (240) 403-2552 | 2 |
| (240) 403-26** | (240) 403-2611 - (240) 403-2692 | 7 |
| (240) 403-27** | (240) 403-2762 - (240) 403-2762 | 1 |
| (240) 403-28** | (240) 403-2882 - (240) 403-2882 | 1 |
| (240) 403-29** | (240) 403-2921 - (240) 403-2997 | 12 |
US Phone Directory: (240) 403-2***
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