| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (312) 501-50** | (312) 501-5010 - (312) 501-5098 | 12 |
| (312) 501-51** | (312) 501-5109 - (312) 501-5197 | 6 |
| (312) 501-52** | (312) 501-5201 - (312) 501-5291 | 10 |
| (312) 501-53** | (312) 501-5315 - (312) 501-5365 | 4 |
| (312) 501-54** | (312) 501-5427 - (312) 501-5499 | 6 |
| (312) 501-55** | (312) 501-5500 - (312) 501-5585 | 10 |
| (312) 501-56** | (312) 501-5600 - (312) 501-5678 | 7 |
| (312) 501-57** | (312) 501-5706 - (312) 501-5795 | 10 |
| (312) 501-58** | (312) 501-5846 - (312) 501-5893 | 4 |
| (312) 501-59** | (312) 501-5913 - (312) 501-5969 | 5 |
US Phone Directory: (312) 501-5***
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