| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 452-70** | (301) 452-7001 - (301) 452-7097 | 33 |
| (301) 452-71** | (301) 452-7101 - (301) 452-7199 | 33 |
| (301) 452-72** | (301) 452-7202 - (301) 452-7296 | 36 |
| (301) 452-73** | (301) 452-7301 - (301) 452-7397 | 27 |
| (301) 452-74** | (301) 452-7400 - (301) 452-7499 | 37 |
| (301) 452-75** | (301) 452-7501 - (301) 452-7599 | 34 |
| (301) 452-76** | (301) 452-7600 - (301) 452-7698 | 37 |
| (301) 452-77** | (301) 452-7700 - (301) 452-7799 | 36 |
| (301) 452-78** | (301) 452-7809 - (301) 452-7899 | 33 |
| (301) 452-79** | (301) 452-7900 - (301) 452-7999 | 35 |
US Phone Directory: (301) 452-7***
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