| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 565-70** | (301) 565-7016 - (301) 565-7016 | 1 |
| (301) 565-72** | (301) 565-7220 - (301) 565-7242 | 3 |
| (301) 565-73** | (301) 565-7300 - (301) 565-7381 | 5 |
| (301) 565-74** | (301) 565-7460 - (301) 565-7494 | 3 |
| (301) 565-75** | (301) 565-7505 - (301) 565-7588 | 5 |
| (301) 565-76** | (301) 565-7613 - (301) 565-7693 | 9 |
| (301) 565-77** | (301) 565-7702 - (301) 565-7744 | 5 |
| (301) 565-78** | (301) 565-7803 - (301) 565-7899 | 64 |
| (301) 565-79** | (301) 565-7963 - (301) 565-7963 | 1 |
US Phone Directory: (301) 565-7***
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