| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (312) 217-70** | (312) 217-7001 - (312) 217-7099 | 19 |
| (312) 217-71** | (312) 217-7102 - (312) 217-7199 | 14 |
| (312) 217-72** | (312) 217-7205 - (312) 217-7299 | 12 |
| (312) 217-73** | (312) 217-7303 - (312) 217-7399 | 17 |
| (312) 217-74** | (312) 217-7406 - (312) 217-7492 | 14 |
| (312) 217-75** | (312) 217-7500 - (312) 217-7599 | 25 |
| (312) 217-76** | (312) 217-7605 - (312) 217-7695 | 13 |
| (312) 217-77** | (312) 217-7701 - (312) 217-7799 | 24 |
| (312) 217-78** | (312) 217-7800 - (312) 217-7898 | 18 |
| (312) 217-79** | (312) 217-7900 - (312) 217-7996 | 8 |
US Phone Directory: (312) 217-7***
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