| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (773) 233-30** | (773) 233-3000 - (773) 233-3099 | 73 |
| (773) 233-31** | (773) 233-3100 - (773) 233-3199 | 73 |
| (773) 233-32** | (773) 233-3200 - (773) 233-3299 | 76 |
| (773) 233-33** | (773) 233-3300 - (773) 233-3399 | 69 |
| (773) 233-34** | (773) 233-3400 - (773) 233-3499 | 77 |
| (773) 233-35** | (773) 233-3500 - (773) 233-3599 | 78 |
| (773) 233-36** | (773) 233-3600 - (773) 233-3699 | 66 |
| (773) 233-37** | (773) 233-3700 - (773) 233-3799 | 73 |
| (773) 233-38** | (773) 233-3800 - (773) 233-3899 | 71 |
| (773) 233-39** | (773) 233-3900 - (773) 233-3999 | 66 |
US Phone Directory: (773) 233-3***
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