| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 230-20** | (301) 230-2000 - (301) 230-2098 | 62 |
| (301) 230-21** | (301) 230-2100 - (301) 230-2199 | 52 |
| (301) 230-22** | (301) 230-2216 - (301) 230-2299 | 60 |
| (301) 230-23** | (301) 230-2300 - (301) 230-2396 | 60 |
| (301) 230-24** | (301) 230-2400 - (301) 230-2499 | 57 |
| (301) 230-25** | (301) 230-2500 - (301) 230-2599 | 62 |
| (301) 230-26** | (301) 230-2600 - (301) 230-2696 | 64 |
| (301) 230-27** | (301) 230-2700 - (301) 230-2797 | 66 |
| (301) 230-28** | (301) 230-2800 - (301) 230-2898 | 57 |
| (301) 230-29** | (301) 230-2901 - (301) 230-2999 | 54 |
US Phone Directory: (301) 230-2***
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