| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (312) 867-30** | (312) 867-3000 - (312) 867-3099 | 74 |
| (312) 867-31** | (312) 867-3100 - (312) 867-3197 | 44 |
| (312) 867-32** | (312) 867-3242 - (312) 867-3289 | 7 |
| (312) 867-33** | (312) 867-3333 - (312) 867-3334 | 2 |
| (312) 867-34** | (312) 867-3400 - (312) 867-3481 | 5 |
| (312) 867-35** | (312) 867-3504 - (312) 867-3567 | 15 |
| (312) 867-36** | (312) 867-3600 - (312) 867-3688 | 61 |
| (312) 867-37** | (312) 867-3701 - (312) 867-3777 | 21 |
| (312) 867-38** | (312) 867-3812 - (312) 867-3899 | 69 |
| (312) 867-39** | (312) 867-3906 - (312) 867-3991 | 31 |
US Phone Directory: (312) 867-3***
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