| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 420-90** | (301) 420-9000 - (301) 420-9099 | 50 |
| (301) 420-91** | (301) 420-9100 - (301) 420-9198 | 51 |
| (301) 420-92** | (301) 420-9201 - (301) 420-9298 | 48 |
| (301) 420-93** | (301) 420-9300 - (301) 420-9393 | 46 |
| (301) 420-94** | (301) 420-9400 - (301) 420-9497 | 34 |
| (301) 420-95** | (301) 420-9500 - (301) 420-9599 | 37 |
| (301) 420-96** | (301) 420-9606 - (301) 420-9698 | 22 |
| (301) 420-97** | (301) 420-9702 - (301) 420-9799 | 40 |
| (301) 420-98** | (301) 420-9808 - (301) 420-9899 | 27 |
| (301) 420-99** | (301) 420-9939 - (301) 420-9999 | 2 |
US Phone Directory: (301) 420-9***
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