| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 606-60** | (301) 606-6000 - (301) 606-6093 | 36 |
| (301) 606-61** | (301) 606-6100 - (301) 606-6192 | 31 |
| (301) 606-62** | (301) 606-6201 - (301) 606-6297 | 37 |
| (301) 606-63** | (301) 606-6303 - (301) 606-6395 | 32 |
| (301) 606-64** | (301) 606-6400 - (301) 606-6483 | 31 |
| (301) 606-65** | (301) 606-6504 - (301) 606-6595 | 29 |
| (301) 606-66** | (301) 606-6601 - (301) 606-6699 | 46 |
| (301) 606-67** | (301) 606-6701 - (301) 606-6799 | 43 |
| (301) 606-68** | (301) 606-6801 - (301) 606-6899 | 39 |
| (301) 606-69** | (301) 606-6901 - (301) 606-6999 | 50 |
US Phone Directory: (301) 606-6***
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