| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 387-80** | (301) 387-8000 - (301) 387-8097 | 84 |
| (301) 387-81** | (301) 387-8100 - (301) 387-8199 | 79 |
| (301) 387-82** | (301) 387-8200 - (301) 387-8299 | 78 |
| (301) 387-83** | (301) 387-8300 - (301) 387-8399 | 78 |
| (301) 387-84** | (301) 387-8401 - (301) 387-8499 | 80 |
| (301) 387-85** | (301) 387-8501 - (301) 387-8598 | 75 |
| (301) 387-87** | (301) 387-8705 - (301) 387-8796 | 28 |
| (301) 387-88** | (301) 387-8806 - (301) 387-8888 | 28 |
| (301) 387-89** | (301) 387-8901 - (301) 387-8997 | 23 |
US Phone Directory: (301) 387-8***
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