| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 443-40** | (301) 443-4000 - (301) 443-4096 | 3 |
| (301) 443-41** | (301) 443-4130 - (301) 443-4198 | 4 |
| (301) 443-42** | (301) 443-4210 - (301) 443-4291 | 4 |
| (301) 443-43** | (301) 443-4319 - (301) 443-4320 | 2 |
| (301) 443-44** | (301) 443-4423 - (301) 443-4491 | 6 |
| (301) 443-45** | (301) 443-4513 - (301) 443-4593 | 4 |
| (301) 443-46** | (301) 443-4644 - (301) 443-4690 | 4 |
| (301) 443-47** | (301) 443-4700 - (301) 443-4795 | 4 |
| (301) 443-48** | (301) 443-4824 - (301) 443-4861 | 3 |
US Phone Directory: (301) 443-4***
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