| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (773) 857-30** | (773) 857-3000 - (773) 857-3099 | 97 |
| (773) 857-31** | (773) 857-3100 - (773) 857-3199 | 91 |
| (773) 857-32** | (773) 857-3200 - (773) 857-3299 | 95 |
| (773) 857-33** | (773) 857-3301 - (773) 857-3399 | 92 |
| (773) 857-34** | (773) 857-3400 - (773) 857-3499 | 90 |
| (773) 857-35** | (773) 857-3500 - (773) 857-3599 | 92 |
| (773) 857-36** | (773) 857-3600 - (773) 857-3698 | 82 |
| (773) 857-37** | (773) 857-3700 - (773) 857-3799 | 77 |
| (773) 857-38** | (773) 857-3800 - (773) 857-3899 | 83 |
| (773) 857-39** | (773) 857-3900 - (773) 857-3999 | 78 |
US Phone Directory: (773) 857-3***
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