| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (773) 478-50** | (773) 478-5000 - (773) 478-5099 | 79 |
| (773) 478-51** | (773) 478-5100 - (773) 478-5196 | 70 |
| (773) 478-52** | (773) 478-5200 - (773) 478-5299 | 74 |
| (773) 478-53** | (773) 478-5300 - (773) 478-5399 | 73 |
| (773) 478-54** | (773) 478-5400 - (773) 478-5499 | 71 |
| (773) 478-55** | (773) 478-5500 - (773) 478-5599 | 64 |
| (773) 478-56** | (773) 478-5600 - (773) 478-5699 | 73 |
| (773) 478-57** | (773) 478-5700 - (773) 478-5797 | 68 |
| (773) 478-58** | (773) 478-5800 - (773) 478-5899 | 72 |
| (773) 478-59** | (773) 478-5900 - (773) 478-5998 | 68 |
US Phone Directory: (773) 478-5***
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