| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 589-70** | (301) 589-7000 - (301) 589-7099 | 62 |
| (301) 589-71** | (301) 589-7100 - (301) 589-7199 | 57 |
| (301) 589-72** | (301) 589-7202 - (301) 589-7299 | 63 |
| (301) 589-73** | (301) 589-7300 - (301) 589-7397 | 67 |
| (301) 589-74** | (301) 589-7400 - (301) 589-7499 | 67 |
| (301) 589-75** | (301) 589-7501 - (301) 589-7598 | 65 |
| (301) 589-76** | (301) 589-7600 - (301) 589-7699 | 73 |
| (301) 589-77** | (301) 589-7701 - (301) 589-7799 | 62 |
| (301) 589-78** | (301) 589-7800 - (301) 589-7898 | 63 |
| (301) 589-79** | (301) 589-7900 - (301) 589-7999 | 59 |
US Phone Directory: (301) 589-7***
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