| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 537-80** | (301) 537-8000 - (301) 537-8095 | 25 |
| (301) 537-81** | (301) 537-8100 - (301) 537-8199 | 22 |
| (301) 537-82** | (301) 537-8200 - (301) 537-8299 | 26 |
| (301) 537-83** | (301) 537-8300 - (301) 537-8396 | 25 |
| (301) 537-84** | (301) 537-8402 - (301) 537-8499 | 38 |
| (301) 537-85** | (301) 537-8500 - (301) 537-8598 | 23 |
| (301) 537-86** | (301) 537-8600 - (301) 537-8690 | 28 |
| (301) 537-87** | (301) 537-8702 - (301) 537-8793 | 22 |
| (301) 537-88** | (301) 537-8801 - (301) 537-8897 | 28 |
| (301) 537-89** | (301) 537-8901 - (301) 537-8999 | 25 |
US Phone Directory: (301) 537-8***
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