| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (312) 587-70** | (312) 587-7000 - (312) 587-7099 | 66 |
| (312) 587-71** | (312) 587-7102 - (312) 587-7199 | 70 |
| (312) 587-72** | (312) 587-7200 - (312) 587-7298 | 72 |
| (312) 587-73** | (312) 587-7300 - (312) 587-7399 | 71 |
| (312) 587-74** | (312) 587-7400 - (312) 587-7499 | 74 |
| (312) 587-75** | (312) 587-7500 - (312) 587-7595 | 65 |
| (312) 587-76** | (312) 587-7600 - (312) 587-7699 | 76 |
| (312) 587-77** | (312) 587-7700 - (312) 587-7799 | 70 |
| (312) 587-78** | (312) 587-7800 - (312) 587-7899 | 77 |
| (312) 587-79** | (312) 587-7900 - (312) 587-7996 | 65 |
US Phone Directory: (312) 587-7***
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