| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (240) 654-40** | (240) 654-4000 - (240) 654-4099 | 86 |
| (240) 654-41** | (240) 654-4100 - (240) 654-4199 | 75 |
| (240) 654-42** | (240) 654-4200 - (240) 654-4299 | 87 |
| (240) 654-43** | (240) 654-4301 - (240) 654-4399 | 78 |
| (240) 654-44** | (240) 654-4400 - (240) 654-4496 | 74 |
| (240) 654-45** | (240) 654-4502 - (240) 654-4599 | 84 |
| (240) 654-46** | (240) 654-4600 - (240) 654-4699 | 85 |
| (240) 654-47** | (240) 654-4700 - (240) 654-4799 | 80 |
| (240) 654-48** | (240) 654-4800 - (240) 654-4899 | 75 |
| (240) 654-49** | (240) 654-4900 - (240) 654-4999 | 80 |
US Phone Directory: (240) 654-4***
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