| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (240) 619-30** | (240) 619-3000 - (240) 619-3099 | 89 |
| (240) 619-31** | (240) 619-3100 - (240) 619-3199 | 83 |
| (240) 619-32** | (240) 619-3200 - (240) 619-3299 | 85 |
| (240) 619-33** | (240) 619-3300 - (240) 619-3399 | 90 |
| (240) 619-34** | (240) 619-3400 - (240) 619-3499 | 91 |
| (240) 619-35** | (240) 619-3500 - (240) 619-3599 | 90 |
| (240) 619-36** | (240) 619-3600 - (240) 619-3699 | 90 |
| (240) 619-37** | (240) 619-3700 - (240) 619-3799 | 92 |
| (240) 619-38** | (240) 619-3800 - (240) 619-3899 | 96 |
| (240) 619-39** | (240) 619-3900 - (240) 619-3999 | 96 |
US Phone Directory: (240) 619-3***
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