| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 275-70** | (301) 275-7024 - (301) 275-7097 | 6 |
| (301) 275-72** | (301) 275-7218 - (301) 275-7286 | 4 |
| (301) 275-73** | (301) 275-7312 - (301) 275-7389 | 11 |
| (301) 275-74** | (301) 275-7429 - (301) 275-7493 | 6 |
| (301) 275-75** | (301) 275-7504 - (301) 275-7596 | 11 |
| (301) 275-76** | (301) 275-7621 - (301) 275-7671 | 7 |
| (301) 275-77** | (301) 275-7733 - (301) 275-7792 | 5 |
| (301) 275-78** | (301) 275-7857 - (301) 275-7888 | 3 |
| (301) 275-79** | (301) 275-7903 - (301) 275-7962 | 3 |
US Phone Directory: (301) 275-7***
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