| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (240) 863-30** | (240) 863-3000 - (240) 863-3099 | 76 |
| (240) 863-31** | (240) 863-3100 - (240) 863-3199 | 75 |
| (240) 863-32** | (240) 863-3200 - (240) 863-3299 | 75 |
| (240) 863-33** | (240) 863-3300 - (240) 863-3399 | 80 |
| (240) 863-34** | (240) 863-3400 - (240) 863-3499 | 78 |
| (240) 863-35** | (240) 863-3500 - (240) 863-3599 | 77 |
| (240) 863-36** | (240) 863-3601 - (240) 863-3698 | 64 |
| (240) 863-37** | (240) 863-3700 - (240) 863-3799 | 65 |
| (240) 863-38** | (240) 863-3801 - (240) 863-3898 | 76 |
| (240) 863-39** | (240) 863-3900 - (240) 863-3999 | 73 |
US Phone Directory: (240) 863-3***
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