| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 420-60** | (301) 420-6001 - (301) 420-6099 | 63 |
| (301) 420-61** | (301) 420-6103 - (301) 420-6198 | 69 |
| (301) 420-62** | (301) 420-6200 - (301) 420-6299 | 72 |
| (301) 420-63** | (301) 420-6301 - (301) 420-6399 | 67 |
| (301) 420-64** | (301) 420-6400 - (301) 420-6499 | 63 |
| (301) 420-65** | (301) 420-6501 - (301) 420-6599 | 70 |
| (301) 420-66** | (301) 420-6601 - (301) 420-6699 | 61 |
| (301) 420-67** | (301) 420-6703 - (301) 420-6797 | 68 |
| (301) 420-68** | (301) 420-6803 - (301) 420-6898 | 66 |
| (301) 420-69** | (301) 420-6900 - (301) 420-6999 | 63 |
US Phone Directory: (301) 420-6***
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