| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (312) 540-30** | (312) 540-3000 - (312) 540-3033 | 8 |
| (312) 540-33** | (312) 540-3300 - (312) 540-3367 | 5 |
| (312) 540-35** | (312) 540-3500 - (312) 540-3501 | 2 |
| (312) 540-37** | (312) 540-3792 - (312) 540-3792 | 1 |
| (312) 540-38** | (312) 540-3848 - (312) 540-3894 | 14 |
| (312) 540-39** | (312) 540-3901 - (312) 540-3998 | 17 |
US Phone Directory: (312) 540-3***
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