| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (773) 637-10** | (773) 637-1001 - (773) 637-1099 | 66 |
| (773) 637-11** | (773) 637-1102 - (773) 637-1199 | 69 |
| (773) 637-12** | (773) 637-1200 - (773) 637-1299 | 77 |
| (773) 637-13** | (773) 637-1300 - (773) 637-1398 | 84 |
| (773) 637-14** | (773) 637-1400 - (773) 637-1499 | 70 |
| (773) 637-15** | (773) 637-1500 - (773) 637-1598 | 78 |
| (773) 637-16** | (773) 637-1600 - (773) 637-1699 | 66 |
| (773) 637-17** | (773) 637-1700 - (773) 637-1797 | 78 |
| (773) 637-18** | (773) 637-1800 - (773) 637-1898 | 73 |
| (773) 637-19** | (773) 637-1900 - (773) 637-1998 | 73 |
US Phone Directory: (773) 637-1***
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