| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 442-40** | (301) 442-4016 - (301) 442-4075 | 6 |
| (301) 442-41** | (301) 442-4129 - (301) 442-4179 | 7 |
| (301) 442-42** | (301) 442-4206 - (301) 442-4299 | 14 |
| (301) 442-43** | (301) 442-4317 - (301) 442-4397 | 9 |
| (301) 442-44** | (301) 442-4425 - (301) 442-4480 | 9 |
| (301) 442-45** | (301) 442-4528 - (301) 442-4581 | 5 |
| (301) 442-46** | (301) 442-4601 - (301) 442-4687 | 6 |
| (301) 442-47** | (301) 442-4716 - (301) 442-4792 | 6 |
| (301) 442-48** | (301) 442-4833 - (301) 442-4899 | 4 |
| (301) 442-49** | (301) 442-4907 - (301) 442-4999 | 10 |
US Phone Directory: (301) 442-4***
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