| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (773) 737-40** | (773) 737-4000 - (773) 737-4099 | 71 |
| (773) 737-41** | (773) 737-4100 - (773) 737-4199 | 66 |
| (773) 737-42** | (773) 737-4200 - (773) 737-4298 | 70 |
| (773) 737-43** | (773) 737-4300 - (773) 737-4399 | 64 |
| (773) 737-44** | (773) 737-4400 - (773) 737-4498 | 62 |
| (773) 737-45** | (773) 737-4500 - (773) 737-4599 | 71 |
| (773) 737-46** | (773) 737-4600 - (773) 737-4699 | 62 |
| (773) 737-47** | (773) 737-4700 - (773) 737-4799 | 69 |
| (773) 737-48** | (773) 737-4801 - (773) 737-4899 | 67 |
| (773) 737-49** | (773) 737-4900 - (773) 737-4998 | 75 |
US Phone Directory: (773) 737-4***
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