| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (312) 446-70** | (312) 446-7000 - (312) 446-7089 | 21 |
| (312) 446-71** | (312) 446-7100 - (312) 446-7193 | 17 |
| (312) 446-72** | (312) 446-7200 - (312) 446-7299 | 22 |
| (312) 446-73** | (312) 446-7301 - (312) 446-7392 | 21 |
| (312) 446-74** | (312) 446-7402 - (312) 446-7495 | 15 |
| (312) 446-75** | (312) 446-7504 - (312) 446-7598 | 29 |
| (312) 446-76** | (312) 446-7603 - (312) 446-7692 | 19 |
| (312) 446-77** | (312) 446-7709 - (312) 446-7799 | 21 |
| (312) 446-78** | (312) 446-7807 - (312) 446-7877 | 15 |
| (312) 446-79** | (312) 446-7906 - (312) 446-7995 | 18 |
US Phone Directory: (312) 446-7***
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