| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 567-70** | (301) 567-7000 - (301) 567-7099 | 62 |
| (301) 567-71** | (301) 567-7100 - (301) 567-7199 | 55 |
| (301) 567-72** | (301) 567-7200 - (301) 567-7298 | 59 |
| (301) 567-73** | (301) 567-7300 - (301) 567-7399 | 50 |
| (301) 567-74** | (301) 567-7400 - (301) 567-7499 | 50 |
| (301) 567-75** | (301) 567-7500 - (301) 567-7598 | 54 |
| (301) 567-76** | (301) 567-7601 - (301) 567-7698 | 72 |
| (301) 567-77** | (301) 567-7700 - (301) 567-7797 | 61 |
| (301) 567-78** | (301) 567-7800 - (301) 567-7899 | 59 |
| (301) 567-79** | (301) 567-7901 - (301) 567-7999 | 54 |
US Phone Directory: (301) 567-7***
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