| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (312) 787-50** | (312) 787-5000 - (312) 787-5098 | 56 |
| (312) 787-51** | (312) 787-5100 - (312) 787-5199 | 59 |
| (312) 787-52** | (312) 787-5200 - (312) 787-5297 | 52 |
| (312) 787-53** | (312) 787-5300 - (312) 787-5399 | 51 |
| (312) 787-54** | (312) 787-5400 - (312) 787-5498 | 60 |
| (312) 787-55** | (312) 787-5500 - (312) 787-5596 | 52 |
| (312) 787-56** | (312) 787-5600 - (312) 787-5699 | 60 |
| (312) 787-57** | (312) 787-5700 - (312) 787-5799 | 56 |
| (312) 787-58** | (312) 787-5801 - (312) 787-5899 | 62 |
| (312) 787-59** | (312) 787-5900 - (312) 787-5999 | 53 |
US Phone Directory: (312) 787-5***
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