| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (773) 878-10** | (773) 878-1000 - (773) 878-1099 | 80 |
| (773) 878-11** | (773) 878-1100 - (773) 878-1199 | 78 |
| (773) 878-12** | (773) 878-1200 - (773) 878-1298 | 81 |
| (773) 878-13** | (773) 878-1300 - (773) 878-1399 | 79 |
| (773) 878-14** | (773) 878-1400 - (773) 878-1499 | 79 |
| (773) 878-15** | (773) 878-1501 - (773) 878-1599 | 75 |
| (773) 878-16** | (773) 878-1601 - (773) 878-1698 | 78 |
| (773) 878-17** | (773) 878-1700 - (773) 878-1798 | 84 |
| (773) 878-18** | (773) 878-1800 - (773) 878-1899 | 82 |
| (773) 878-19** | (773) 878-1900 - (773) 878-1999 | 86 |
US Phone Directory: (773) 878-1***
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