| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 428-80** | (301) 428-8004 - (301) 428-8099 | 25 |
| (301) 428-81** | (301) 428-8100 - (301) 428-8191 | 26 |
| (301) 428-82** | (301) 428-8200 - (301) 428-8299 | 27 |
| (301) 428-83** | (301) 428-8300 - (301) 428-8388 | 30 |
| (301) 428-84** | (301) 428-8410 - (301) 428-8495 | 7 |
| (301) 428-85** | (301) 428-8510 - (301) 428-8599 | 3 |
| (301) 428-86** | (301) 428-8647 - (301) 428-8685 | 3 |
| (301) 428-88** | (301) 428-8827 - (301) 428-8888 | 5 |
| (301) 428-89** | (301) 428-8901 - (301) 428-8995 | 24 |
US Phone Directory: (301) 428-8***
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