| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 474-80** | (301) 474-8000 - (301) 474-8099 | 71 |
| (301) 474-81** | (301) 474-8100 - (301) 474-8196 | 63 |
| (301) 474-82** | (301) 474-8200 - (301) 474-8299 | 66 |
| (301) 474-83** | (301) 474-8300 - (301) 474-8399 | 67 |
| (301) 474-84** | (301) 474-8405 - (301) 474-8498 | 66 |
| (301) 474-85** | (301) 474-8500 - (301) 474-8598 | 57 |
| (301) 474-86** | (301) 474-8600 - (301) 474-8699 | 62 |
| (301) 474-87** | (301) 474-8700 - (301) 474-8795 | 66 |
| (301) 474-88** | (301) 474-8801 - (301) 474-8899 | 71 |
| (301) 474-89** | (301) 474-8900 - (301) 474-8998 | 65 |
US Phone Directory: (301) 474-8***
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