| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 765-30** | (301) 765-3079 - (301) 765-3079 | 1 |
| (301) 765-31** | (301) 765-3155 - (301) 765-3155 | 1 |
| (301) 765-33** | (301) 765-3300 - (301) 765-3399 | 69 |
| (301) 765-34** | (301) 765-3400 - (301) 765-3499 | 46 |
| (301) 765-35** | (301) 765-3500 - (301) 765-3599 | 30 |
| (301) 765-36** | (301) 765-3600 - (301) 765-3695 | 37 |
| (301) 765-37** | (301) 765-3722 - (301) 765-3722 | 1 |
| (301) 765-38** | (301) 765-3832 - (301) 765-3832 | 1 |
US Phone Directory: (301) 765-3***
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