| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (773) 631-40** | (773) 631-4000 - (773) 631-4099 | 68 |
| (773) 631-41** | (773) 631-4100 - (773) 631-4199 | 62 |
| (773) 631-42** | (773) 631-4200 - (773) 631-4299 | 70 |
| (773) 631-43** | (773) 631-4300 - (773) 631-4399 | 73 |
| (773) 631-44** | (773) 631-4400 - (773) 631-4498 | 74 |
| (773) 631-45** | (773) 631-4500 - (773) 631-4595 | 64 |
| (773) 631-46** | (773) 631-4600 - (773) 631-4699 | 77 |
| (773) 631-47** | (773) 631-4700 - (773) 631-4799 | 62 |
| (773) 631-48** | (773) 631-4800 - (773) 631-4898 | 67 |
| (773) 631-49** | (773) 631-4900 - (773) 631-4999 | 69 |
US Phone Directory: (773) 631-4***
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