| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (773) 731-10** | (773) 731-1000 - (773) 731-1098 | 52 |
| (773) 731-11** | (773) 731-1100 - (773) 731-1193 | 43 |
| (773) 731-12** | (773) 731-1200 - (773) 731-1299 | 55 |
| (773) 731-13** | (773) 731-1300 - (773) 731-1398 | 58 |
| (773) 731-14** | (773) 731-1400 - (773) 731-1497 | 46 |
| (773) 731-15** | (773) 731-1502 - (773) 731-1599 | 47 |
| (773) 731-16** | (773) 731-1602 - (773) 731-1698 | 58 |
| (773) 731-17** | (773) 731-1702 - (773) 731-1798 | 62 |
| (773) 731-18** | (773) 731-1803 - (773) 731-1899 | 59 |
| (773) 731-19** | (773) 731-1902 - (773) 731-1995 | 46 |
US Phone Directory: (773) 731-1***
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