| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (240) 912-40** | (240) 912-4000 - (240) 912-4099 | 91 |
| (240) 912-41** | (240) 912-4100 - (240) 912-4199 | 91 |
| (240) 912-42** | (240) 912-4200 - (240) 912-4299 | 89 |
| (240) 912-43** | (240) 912-4300 - (240) 912-4399 | 95 |
| (240) 912-44** | (240) 912-4400 - (240) 912-4499 | 93 |
| (240) 912-45** | (240) 912-4500 - (240) 912-4599 | 91 |
| (240) 912-46** | (240) 912-4600 - (240) 912-4699 | 93 |
| (240) 912-47** | (240) 912-4700 - (240) 912-4799 | 89 |
| (240) 912-48** | (240) 912-4800 - (240) 912-4899 | 96 |
| (240) 912-49** | (240) 912-4900 - (240) 912-4999 | 87 |
US Phone Directory: (240) 912-4***
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