| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (773) 434-20** | (773) 434-2000 - (773) 434-2098 | 75 |
| (773) 434-21** | (773) 434-2100 - (773) 434-2199 | 76 |
| (773) 434-22** | (773) 434-2200 - (773) 434-2299 | 73 |
| (773) 434-23** | (773) 434-2300 - (773) 434-2399 | 70 |
| (773) 434-24** | (773) 434-2400 - (773) 434-2499 | 74 |
| (773) 434-25** | (773) 434-2500 - (773) 434-2598 | 76 |
| (773) 434-26** | (773) 434-2600 - (773) 434-2699 | 74 |
| (773) 434-27** | (773) 434-2700 - (773) 434-2799 | 73 |
| (773) 434-28** | (773) 434-2802 - (773) 434-2899 | 79 |
| (773) 434-29** | (773) 434-2900 - (773) 434-2997 | 81 |
US Phone Directory: (773) 434-2***
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