| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 829-20** | (301) 829-2000 - (301) 829-2099 | 86 |
| (301) 829-21** | (301) 829-2100 - (301) 829-2199 | 84 |
| (301) 829-22** | (301) 829-2200 - (301) 829-2299 | 82 |
| (301) 829-23** | (301) 829-2300 - (301) 829-2399 | 81 |
| (301) 829-24** | (301) 829-2400 - (301) 829-2499 | 82 |
| (301) 829-25** | (301) 829-2500 - (301) 829-2599 | 82 |
| (301) 829-26** | (301) 829-2600 - (301) 829-2699 | 81 |
| (301) 829-27** | (301) 829-2700 - (301) 829-2799 | 85 |
| (301) 829-28** | (301) 829-2800 - (301) 829-2899 | 84 |
| (301) 829-29** | (301) 829-2900 - (301) 829-2999 | 85 |
US Phone Directory: (301) 829-2***
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