| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 972-10** | (301) 972-1000 - (301) 972-1099 | 86 |
| (301) 972-11** | (301) 972-1100 - (301) 972-1199 | 89 |
| (301) 972-12** | (301) 972-1201 - (301) 972-1299 | 89 |
| (301) 972-13** | (301) 972-1301 - (301) 972-1399 | 88 |
| (301) 972-14** | (301) 972-1400 - (301) 972-1499 | 88 |
| (301) 972-15** | (301) 972-1500 - (301) 972-1599 | 89 |
| (301) 972-16** | (301) 972-1600 - (301) 972-1699 | 84 |
| (301) 972-17** | (301) 972-1700 - (301) 972-1798 | 85 |
| (301) 972-18** | (301) 972-1800 - (301) 972-1898 | 78 |
| (301) 972-19** | (301) 972-1901 - (301) 972-1999 | 88 |
US Phone Directory: (301) 972-1***
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