| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (240) 603-40** | (240) 603-4031 - (240) 603-4045 | 2 |
| (240) 603-41** | (240) 603-4128 - (240) 603-4164 | 7 |
| (240) 603-42** | (240) 603-4228 - (240) 603-4284 | 2 |
| (240) 603-43** | (240) 603-4319 - (240) 603-4393 | 4 |
| (240) 603-44** | (240) 603-4411 - (240) 603-4484 | 10 |
| (240) 603-45** | (240) 603-4510 - (240) 603-4597 | 6 |
| (240) 603-46** | (240) 603-4604 - (240) 603-4696 | 8 |
| (240) 603-47** | (240) 603-4715 - (240) 603-4798 | 5 |
| (240) 603-48** | (240) 603-4811 - (240) 603-4899 | 11 |
| (240) 603-49** | (240) 603-4920 - (240) 603-4944 | 3 |
US Phone Directory: (240) 603-4***
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