| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (312) 207-10** | (312) 207-1000 - (312) 207-1097 | 33 |
| (312) 207-11** | (312) 207-1100 - (312) 207-1197 | 19 |
| (312) 207-12** | (312) 207-1200 - (312) 207-1298 | 32 |
| (312) 207-13** | (312) 207-1300 - (312) 207-1399 | 38 |
| (312) 207-14** | (312) 207-1402 - (312) 207-1482 | 36 |
| (312) 207-15** | (312) 207-1500 - (312) 207-1595 | 39 |
| (312) 207-16** | (312) 207-1600 - (312) 207-1694 | 40 |
| (312) 207-17** | (312) 207-1700 - (312) 207-1797 | 22 |
| (312) 207-18** | (312) 207-1800 - (312) 207-1896 | 22 |
| (312) 207-19** | (312) 207-1900 - (312) 207-1997 | 34 |
US Phone Directory: (312) 207-1***
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