| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (312) 634-50** | (312) 634-5000 - (312) 634-5099 | 28 |
| (312) 634-51** | (312) 634-5101 - (312) 634-5119 | 7 |
| (312) 634-52** | (312) 634-5200 - (312) 634-5253 | 4 |
| (312) 634-53** | (312) 634-5333 - (312) 634-5333 | 1 |
| (312) 634-54** | (312) 634-5419 - (312) 634-5419 | 1 |
US Phone Directory: (312) 634-5***
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