| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (773) 436-40** | (773) 436-4000 - (773) 436-4099 | 68 |
| (773) 436-41** | (773) 436-4100 - (773) 436-4199 | 73 |
| (773) 436-42** | (773) 436-4200 - (773) 436-4299 | 73 |
| (773) 436-43** | (773) 436-4300 - (773) 436-4399 | 66 |
| (773) 436-44** | (773) 436-4400 - (773) 436-4499 | 66 |
| (773) 436-45** | (773) 436-4500 - (773) 436-4599 | 76 |
| (773) 436-46** | (773) 436-4600 - (773) 436-4698 | 65 |
| (773) 436-47** | (773) 436-4701 - (773) 436-4799 | 76 |
| (773) 436-48** | (773) 436-4800 - (773) 436-4899 | 71 |
| (773) 436-49** | (773) 436-4902 - (773) 436-4999 | 74 |
US Phone Directory: (773) 436-4***
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