| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 790-20** | (301) 790-2000 - (301) 790-2099 | 75 |
| (301) 790-21** | (301) 790-2100 - (301) 790-2199 | 72 |
| (301) 790-22** | (301) 790-2200 - (301) 790-2297 | 73 |
| (301) 790-23** | (301) 790-2300 - (301) 790-2399 | 79 |
| (301) 790-24** | (301) 790-2400 - (301) 790-2499 | 74 |
| (301) 790-25** | (301) 790-2500 - (301) 790-2599 | 74 |
| (301) 790-26** | (301) 790-2600 - (301) 790-2699 | 68 |
| (301) 790-27** | (301) 790-2700 - (301) 790-2799 | 63 |
| (301) 790-28** | (301) 790-2800 - (301) 790-2899 | 67 |
| (301) 790-29** | (301) 790-2900 - (301) 790-2999 | 72 |
US Phone Directory: (301) 790-2***
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