| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (312) 867-70** | (312) 867-7000 - (312) 867-7099 | 77 |
| (312) 867-71** | (312) 867-7100 - (312) 867-7199 | 81 |
| (312) 867-72** | (312) 867-7200 - (312) 867-7299 | 82 |
| (312) 867-73** | (312) 867-7300 - (312) 867-7399 | 49 |
| (312) 867-74** | (312) 867-7400 - (312) 867-7495 | 58 |
| (312) 867-75** | (312) 867-7508 - (312) 867-7599 | 28 |
| (312) 867-76** | (312) 867-7601 - (312) 867-7697 | 53 |
| (312) 867-77** | (312) 867-7700 - (312) 867-7796 | 47 |
| (312) 867-78** | (312) 867-7800 - (312) 867-7899 | 38 |
| (312) 867-79** | (312) 867-7901 - (312) 867-7996 | 29 |
US Phone Directory: (312) 867-7***
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