| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (312) 829-70** | (312) 829-7000 - (312) 829-7095 | 26 |
| (312) 829-71** | (312) 829-7100 - (312) 829-7193 | 32 |
| (312) 829-72** | (312) 829-7200 - (312) 829-7282 | 24 |
| (312) 829-73** | (312) 829-7300 - (312) 829-7399 | 28 |
| (312) 829-74** | (312) 829-7408 - (312) 829-7499 | 21 |
| (312) 829-75** | (312) 829-7501 - (312) 829-7588 | 22 |
| (312) 829-76** | (312) 829-7601 - (312) 829-7699 | 26 |
| (312) 829-77** | (312) 829-7709 - (312) 829-7798 | 17 |
| (312) 829-78** | (312) 829-7800 - (312) 829-7899 | 25 |
| (312) 829-79** | (312) 829-7900 - (312) 829-7998 | 27 |
US Phone Directory: (312) 829-7***
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