| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 657-20** | (301) 657-2000 - (301) 657-2099 | 54 |
| (301) 657-21** | (301) 657-2100 - (301) 657-2198 | 47 |
| (301) 657-22** | (301) 657-2200 - (301) 657-2297 | 53 |
| (301) 657-23** | (301) 657-2300 - (301) 657-2397 | 49 |
| (301) 657-24** | (301) 657-2400 - (301) 657-2499 | 57 |
| (301) 657-25** | (301) 657-2500 - (301) 657-2599 | 46 |
| (301) 657-26** | (301) 657-2600 - (301) 657-2699 | 62 |
| (301) 657-27** | (301) 657-2700 - (301) 657-2798 | 52 |
| (301) 657-28** | (301) 657-2800 - (301) 657-2897 | 50 |
| (301) 657-29** | (301) 657-2900 - (301) 657-2997 | 54 |
US Phone Directory: (301) 657-2***
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