| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 336-80** | (301) 336-8000 - (301) 336-8098 | 53 |
| (301) 336-81** | (301) 336-8101 - (301) 336-8197 | 55 |
| (301) 336-82** | (301) 336-8201 - (301) 336-8299 | 58 |
| (301) 336-83** | (301) 336-8300 - (301) 336-8399 | 57 |
| (301) 336-84** | (301) 336-8400 - (301) 336-8497 | 58 |
| (301) 336-85** | (301) 336-8500 - (301) 336-8598 | 60 |
| (301) 336-86** | (301) 336-8600 - (301) 336-8698 | 57 |
| (301) 336-87** | (301) 336-8705 - (301) 336-8799 | 61 |
| (301) 336-88** | (301) 336-8800 - (301) 336-8898 | 49 |
| (301) 336-89** | (301) 336-8900 - (301) 336-8999 | 58 |
US Phone Directory: (301) 336-8***
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