| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (773) 940-10** | (773) 940-1000 - (773) 940-1099 | 86 |
| (773) 940-11** | (773) 940-1100 - (773) 940-1198 | 85 |
| (773) 940-12** | (773) 940-1200 - (773) 940-1298 | 83 |
| (773) 940-13** | (773) 940-1300 - (773) 940-1397 | 83 |
| (773) 940-14** | (773) 940-1400 - (773) 940-1498 | 83 |
| (773) 940-15** | (773) 940-1500 - (773) 940-1599 | 79 |
| (773) 940-16** | (773) 940-1600 - (773) 940-1698 | 85 |
| (773) 940-17** | (773) 940-1700 - (773) 940-1799 | 81 |
| (773) 940-18** | (773) 940-1800 - (773) 940-1899 | 84 |
| (773) 940-19** | (773) 940-1900 - (773) 940-1999 | 85 |
US Phone Directory: (773) 940-1***
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