| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 537-70** | (301) 537-7008 - (301) 537-7097 | 33 |
| (301) 537-71** | (301) 537-7107 - (301) 537-7195 | 34 |
| (301) 537-72** | (301) 537-7200 - (301) 537-7298 | 29 |
| (301) 537-73** | (301) 537-7303 - (301) 537-7397 | 26 |
| (301) 537-74** | (301) 537-7405 - (301) 537-7495 | 30 |
| (301) 537-75** | (301) 537-7508 - (301) 537-7597 | 28 |
| (301) 537-76** | (301) 537-7608 - (301) 537-7699 | 25 |
| (301) 537-77** | (301) 537-7708 - (301) 537-7790 | 27 |
| (301) 537-78** | (301) 537-7801 - (301) 537-7893 | 32 |
| (301) 537-79** | (301) 537-7912 - (301) 537-7999 | 29 |
US Phone Directory: (301) 537-7***
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