| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 346-40** | (301) 346-4003 - (301) 346-4094 | 14 |
| (301) 346-41** | (301) 346-4100 - (301) 346-4198 | 22 |
| (301) 346-42** | (301) 346-4201 - (301) 346-4295 | 23 |
| (301) 346-43** | (301) 346-4301 - (301) 346-4396 | 21 |
| (301) 346-44** | (301) 346-4402 - (301) 346-4493 | 19 |
| (301) 346-45** | (301) 346-4502 - (301) 346-4597 | 19 |
| (301) 346-46** | (301) 346-4604 - (301) 346-4696 | 22 |
| (301) 346-47** | (301) 346-4701 - (301) 346-4786 | 10 |
| (301) 346-48** | (301) 346-4804 - (301) 346-4893 | 18 |
| (301) 346-49** | (301) 346-4901 - (301) 346-4998 | 15 |
US Phone Directory: (301) 346-4***
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