| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 657-80** | (301) 657-8000 - (301) 657-8096 | 64 |
| (301) 657-81** | (301) 657-8100 - (301) 657-8199 | 61 |
| (301) 657-82** | (301) 657-8200 - (301) 657-8299 | 54 |
| (301) 657-83** | (301) 657-8300 - (301) 657-8396 | 47 |
| (301) 657-84** | (301) 657-8403 - (301) 657-8499 | 53 |
| (301) 657-85** | (301) 657-8505 - (301) 657-8595 | 42 |
| (301) 657-86** | (301) 657-8600 - (301) 657-8699 | 52 |
| (301) 657-87** | (301) 657-8700 - (301) 657-8799 | 47 |
| (301) 657-88** | (301) 657-8800 - (301) 657-8899 | 63 |
| (301) 657-89** | (301) 657-8900 - (301) 657-8999 | 55 |
US Phone Directory: (301) 657-8***
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