| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 856-40** | (301) 856-4000 - (301) 856-4098 | 53 |
| (301) 856-41** | (301) 856-4100 - (301) 856-4199 | 56 |
| (301) 856-42** | (301) 856-4200 - (301) 856-4299 | 61 |
| (301) 856-43** | (301) 856-4301 - (301) 856-4398 | 56 |
| (301) 856-44** | (301) 856-4401 - (301) 856-4497 | 56 |
| (301) 856-45** | (301) 856-4500 - (301) 856-4599 | 28 |
| (301) 856-46** | (301) 856-4600 - (301) 856-4699 | 47 |
| (301) 856-47** | (301) 856-4700 - (301) 856-4776 | 14 |
| (301) 856-48** | (301) 856-4800 - (301) 856-4899 | 66 |
| (301) 856-49** | (301) 856-4900 - (301) 856-4999 | 62 |
US Phone Directory: (301) 856-4***
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