| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (773) 643-40** | (773) 643-4000 - (773) 643-4099 | 65 |
| (773) 643-41** | (773) 643-4100 - (773) 643-4198 | 69 |
| (773) 643-42** | (773) 643-4200 - (773) 643-4299 | 63 |
| (773) 643-43** | (773) 643-4300 - (773) 643-4399 | 66 |
| (773) 643-44** | (773) 643-4401 - (773) 643-4499 | 69 |
| (773) 643-45** | (773) 643-4500 - (773) 643-4599 | 78 |
| (773) 643-46** | (773) 643-4601 - (773) 643-4697 | 66 |
| (773) 643-47** | (773) 643-4700 - (773) 643-4799 | 75 |
| (773) 643-48** | (773) 643-4801 - (773) 643-4899 | 55 |
| (773) 643-49** | (773) 643-4900 - (773) 643-4999 | 64 |
US Phone Directory: (773) 643-4***
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