| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (312) 545-30** | (312) 545-3011 - (312) 545-3098 | 13 |
| (312) 545-31** | (312) 545-3103 - (312) 545-3182 | 15 |
| (312) 545-32** | (312) 545-3218 - (312) 545-3298 | 12 |
| (312) 545-33** | (312) 545-3308 - (312) 545-3394 | 7 |
| (312) 545-34** | (312) 545-3404 - (312) 545-3497 | 7 |
| (312) 545-35** | (312) 545-3500 - (312) 545-3585 | 10 |
| (312) 545-36** | (312) 545-3600 - (312) 545-3690 | 18 |
| (312) 545-37** | (312) 545-3707 - (312) 545-3791 | 11 |
| (312) 545-38** | (312) 545-3806 - (312) 545-3892 | 8 |
| (312) 545-39** | (312) 545-3901 - (312) 545-3999 | 12 |
US Phone Directory: (312) 545-3***
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