| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (312) 660-10** | (312) 660-1020 - (312) 660-1057 | 5 |
| (312) 660-11** | (312) 660-1131 - (312) 660-1145 | 4 |
| (312) 660-12** | (312) 660-1229 - (312) 660-1284 | 4 |
| (312) 660-13** | (312) 660-1300 - (312) 660-1388 | 5 |
| (312) 660-14** | (312) 660-1401 - (312) 660-1457 | 5 |
| (312) 660-15** | (312) 660-1500 - (312) 660-1596 | 6 |
| (312) 660-16** | (312) 660-1606 - (312) 660-1680 | 7 |
| (312) 660-17** | (312) 660-1707 - (312) 660-1717 | 2 |
| (312) 660-18** | (312) 660-1827 - (312) 660-1833 | 2 |
| (312) 660-19** | (312) 660-1929 - (312) 660-1963 | 2 |
US Phone Directory: (312) 660-1***
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