| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (312) 472-70** | (312) 472-7020 - (312) 472-7099 | 9 |
| (312) 472-71** | (312) 472-7122 - (312) 472-7185 | 4 |
| (312) 472-72** | (312) 472-7210 - (312) 472-7294 | 12 |
| (312) 472-73** | (312) 472-7325 - (312) 472-7399 | 10 |
| (312) 472-74** | (312) 472-7412 - (312) 472-7498 | 8 |
| (312) 472-75** | (312) 472-7517 - (312) 472-7597 | 6 |
| (312) 472-76** | (312) 472-7613 - (312) 472-7697 | 9 |
| (312) 472-77** | (312) 472-7708 - (312) 472-7784 | 9 |
| (312) 472-78** | (312) 472-7817 - (312) 472-7886 | 8 |
| (312) 472-79** | (312) 472-7917 - (312) 472-7998 | 8 |
US Phone Directory: (312) 472-7***
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