| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (312) 597-30** | (312) 597-3000 - (312) 597-3096 | 3 |
| (312) 597-31** | (312) 597-3128 - (312) 597-3178 | 4 |
| (312) 597-32** | (312) 597-3236 - (312) 597-3287 | 3 |
| (312) 597-33** | (312) 597-3300 - (312) 597-3394 | 2 |
| (312) 597-34** | (312) 597-3431 - (312) 597-3483 | 5 |
| (312) 597-35** | (312) 597-3572 - (312) 597-3595 | 4 |
| (312) 597-36** | (312) 597-3644 - (312) 597-3677 | 5 |
| (312) 597-37** | (312) 597-3749 - (312) 597-3792 | 2 |
| (312) 597-38** | (312) 597-3818 - (312) 597-3892 | 6 |
| (312) 597-39** | (312) 597-3939 - (312) 597-3969 | 2 |
US Phone Directory: (312) 597-3***
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