| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (773) 427-20** | (773) 427-2000 - (773) 427-2079 | 17 |
| (773) 427-21** | (773) 427-2102 - (773) 427-2183 | 4 |
| (773) 427-23** | (773) 427-2399 - (773) 427-2399 | 1 |
| (773) 427-24** | (773) 427-2400 - (773) 427-2499 | 27 |
| (773) 427-25** | (773) 427-2500 - (773) 427-2598 | 72 |
| (773) 427-26** | (773) 427-2600 - (773) 427-2699 | 69 |
| (773) 427-27** | (773) 427-2700 - (773) 427-2798 | 72 |
| (773) 427-28** | (773) 427-2800 - (773) 427-2879 | 25 |
| (773) 427-29** | (773) 427-2901 - (773) 427-2998 | 68 |
US Phone Directory: (773) 427-2***
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