| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (312) 342-70** | (312) 342-7000 - (312) 342-7098 | 38 |
| (312) 342-71** | (312) 342-7101 - (312) 342-7195 | 37 |
| (312) 342-72** | (312) 342-7205 - (312) 342-7299 | 38 |
| (312) 342-73** | (312) 342-7300 - (312) 342-7395 | 28 |
| (312) 342-74** | (312) 342-7400 - (312) 342-7497 | 41 |
| (312) 342-75** | (312) 342-7502 - (312) 342-7592 | 37 |
| (312) 342-76** | (312) 342-7609 - (312) 342-7699 | 40 |
| (312) 342-77** | (312) 342-7701 - (312) 342-7789 | 38 |
| (312) 342-78** | (312) 342-7800 - (312) 342-7891 | 21 |
| (312) 342-79** | (312) 342-7900 - (312) 342-7999 | 24 |
US Phone Directory: (312) 342-7***
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