| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 299-20** | (301) 299-2001 - (301) 299-2099 | 78 |
| (301) 299-21** | (301) 299-2100 - (301) 299-2199 | 68 |
| (301) 299-22** | (301) 299-2201 - (301) 299-2298 | 71 |
| (301) 299-23** | (301) 299-2301 - (301) 299-2399 | 75 |
| (301) 299-24** | (301) 299-2400 - (301) 299-2499 | 85 |
| (301) 299-25** | (301) 299-2500 - (301) 299-2598 | 77 |
| (301) 299-26** | (301) 299-2600 - (301) 299-2699 | 70 |
| (301) 299-27** | (301) 299-2701 - (301) 299-2799 | 77 |
| (301) 299-28** | (301) 299-2800 - (301) 299-2898 | 76 |
| (301) 299-29** | (301) 299-2900 - (301) 299-2998 | 75 |
US Phone Directory: (301) 299-2***
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