| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (312) 922-40** | (312) 922-4000 - (312) 922-4096 | 31 |
| (312) 922-41** | (312) 922-4102 - (312) 922-4198 | 27 |
| (312) 922-42** | (312) 922-4200 - (312) 922-4285 | 19 |
| (312) 922-43** | (312) 922-4305 - (312) 922-4389 | 22 |
| (312) 922-44** | (312) 922-4400 - (312) 922-4498 | 19 |
| (312) 922-45** | (312) 922-4500 - (312) 922-4592 | 26 |
| (312) 922-46** | (312) 922-4604 - (312) 922-4699 | 22 |
| (312) 922-47** | (312) 922-4705 - (312) 922-4771 | 10 |
| (312) 922-48** | (312) 922-4800 - (312) 922-4882 | 12 |
| (312) 922-49** | (312) 922-4910 - (312) 922-4995 | 15 |
US Phone Directory: (312) 922-4***
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