| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 829-30** | (301) 829-3000 - (301) 829-3099 | 75 |
| (301) 829-31** | (301) 829-3100 - (301) 829-3198 | 84 |
| (301) 829-32** | (301) 829-3200 - (301) 829-3299 | 77 |
| (301) 829-33** | (301) 829-3300 - (301) 829-3399 | 70 |
| (301) 829-34** | (301) 829-3400 - (301) 829-3499 | 67 |
| (301) 829-35** | (301) 829-3500 - (301) 829-3599 | 80 |
| (301) 829-36** | (301) 829-3600 - (301) 829-3699 | 74 |
| (301) 829-37** | (301) 829-3701 - (301) 829-3798 | 70 |
| (301) 829-38** | (301) 829-3800 - (301) 829-3894 | 71 |
| (301) 829-39** | (301) 829-3900 - (301) 829-3999 | 75 |
US Phone Directory: (301) 829-3***
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