| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 318-40** | (301) 318-4009 - (301) 318-4089 | 5 |
| (301) 318-41** | (301) 318-4109 - (301) 318-4191 | 6 |
| (301) 318-42** | (301) 318-4210 - (301) 318-4299 | 6 |
| (301) 318-43** | (301) 318-4302 - (301) 318-4368 | 5 |
| (301) 318-44** | (301) 318-4408 - (301) 318-4498 | 5 |
| (301) 318-45** | (301) 318-4526 - (301) 318-4526 | 1 |
| (301) 318-46** | (301) 318-4605 - (301) 318-4664 | 6 |
| (301) 318-47** | (301) 318-4706 - (301) 318-4752 | 7 |
| (301) 318-48** | (301) 318-4805 - (301) 318-4897 | 4 |
| (301) 318-49** | (301) 318-4904 - (301) 318-4908 | 2 |
US Phone Directory: (301) 318-4***
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