| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 516-30** | (301) 516-3000 - (301) 516-3098 | 66 |
| (301) 516-31** | (301) 516-3100 - (301) 516-3199 | 60 |
| (301) 516-32** | (301) 516-3200 - (301) 516-3297 | 29 |
| (301) 516-33** | (301) 516-3301 - (301) 516-3399 | 56 |
| (301) 516-34** | (301) 516-3401 - (301) 516-3499 | 50 |
| (301) 516-35** | (301) 516-3500 - (301) 516-3598 | 52 |
| (301) 516-36** | (301) 516-3601 - (301) 516-3699 | 62 |
| (301) 516-37** | (301) 516-3701 - (301) 516-3796 | 46 |
| (301) 516-38** | (301) 516-3800 - (301) 516-3898 | 50 |
| (301) 516-39** | (301) 516-3902 - (301) 516-3998 | 54 |
US Phone Directory: (301) 516-3***
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