| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 946-40** | (301) 946-4000 - (301) 946-4099 | 77 |
| (301) 946-41** | (301) 946-4100 - (301) 946-4199 | 75 |
| (301) 946-42** | (301) 946-4201 - (301) 946-4299 | 69 |
| (301) 946-43** | (301) 946-4300 - (301) 946-4398 | 78 |
| (301) 946-44** | (301) 946-4406 - (301) 946-4499 | 60 |
| (301) 946-45** | (301) 946-4500 - (301) 946-4599 | 70 |
| (301) 946-46** | (301) 946-4600 - (301) 946-4699 | 71 |
| (301) 946-47** | (301) 946-4700 - (301) 946-4799 | 79 |
| (301) 946-48** | (301) 946-4800 - (301) 946-4899 | 70 |
| (301) 946-49** | (301) 946-4900 - (301) 946-4999 | 74 |
US Phone Directory: (301) 946-4***
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