| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (773) 631-10** | (773) 631-1000 - (773) 631-1099 | 68 |
| (773) 631-11** | (773) 631-1100 - (773) 631-1199 | 70 |
| (773) 631-12** | (773) 631-1200 - (773) 631-1299 | 64 |
| (773) 631-13** | (773) 631-1300 - (773) 631-1398 | 62 |
| (773) 631-14** | (773) 631-1400 - (773) 631-1499 | 70 |
| (773) 631-15** | (773) 631-1500 - (773) 631-1599 | 61 |
| (773) 631-16** | (773) 631-1600 - (773) 631-1699 | 63 |
| (773) 631-17** | (773) 631-1700 - (773) 631-1799 | 67 |
| (773) 631-18** | (773) 631-1800 - (773) 631-1898 | 59 |
| (773) 631-19** | (773) 631-1900 - (773) 631-1999 | 70 |
US Phone Directory: (773) 631-1***
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