| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 459-40** | (301) 459-4000 - (301) 459-4096 | 60 |
| (301) 459-41** | (301) 459-4100 - (301) 459-4199 | 54 |
| (301) 459-42** | (301) 459-4200 - (301) 459-4299 | 63 |
| (301) 459-43** | (301) 459-4300 - (301) 459-4399 | 69 |
| (301) 459-44** | (301) 459-4400 - (301) 459-4499 | 57 |
| (301) 459-45** | (301) 459-4500 - (301) 459-4599 | 59 |
| (301) 459-46** | (301) 459-4600 - (301) 459-4699 | 61 |
| (301) 459-47** | (301) 459-4700 - (301) 459-4799 | 58 |
| (301) 459-48** | (301) 459-4802 - (301) 459-4899 | 60 |
| (301) 459-49** | (301) 459-4900 - (301) 459-4999 | 58 |
US Phone Directory: (301) 459-4***
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