| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 355-80** | (301) 355-8000 - (301) 355-8099 | 81 |
| (301) 355-81** | (301) 355-8100 - (301) 355-8199 | 75 |
| (301) 355-82** | (301) 355-8200 - (301) 355-8299 | 77 |
| (301) 355-83** | (301) 355-8301 - (301) 355-8399 | 74 |
| (301) 355-84** | (301) 355-8400 - (301) 355-8499 | 83 |
| (301) 355-85** | (301) 355-8500 - (301) 355-8599 | 68 |
| (301) 355-86** | (301) 355-8600 - (301) 355-8692 | 39 |
| (301) 355-87** | (301) 355-8708 - (301) 355-8792 | 17 |
| (301) 355-88** | (301) 355-8813 - (301) 355-8896 | 19 |
| (301) 355-89** | (301) 355-8900 - (301) 355-8997 | 20 |
US Phone Directory: (301) 355-8***
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