| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 740-20** | (301) 740-2003 - (301) 740-2099 | 64 |
| (301) 740-21** | (301) 740-2100 - (301) 740-2199 | 52 |
| (301) 740-22** | (301) 740-2201 - (301) 740-2299 | 59 |
| (301) 740-23** | (301) 740-2300 - (301) 740-2399 | 69 |
| (301) 740-24** | (301) 740-2400 - (301) 740-2499 | 59 |
| (301) 740-25** | (301) 740-2500 - (301) 740-2599 | 67 |
| (301) 740-26** | (301) 740-2600 - (301) 740-2698 | 70 |
| (301) 740-27** | (301) 740-2700 - (301) 740-2799 | 74 |
| (301) 740-28** | (301) 740-2807 - (301) 740-2898 | 65 |
| (301) 740-29** | (301) 740-2900 - (301) 740-2999 | 55 |
US Phone Directory: (301) 740-2***
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