| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (773) 525-50** | (773) 525-5000 - (773) 525-5099 | 84 |
| (773) 525-51** | (773) 525-5100 - (773) 525-5199 | 83 |
| (773) 525-52** | (773) 525-5200 - (773) 525-5299 | 78 |
| (773) 525-53** | (773) 525-5300 - (773) 525-5399 | 80 |
| (773) 525-54** | (773) 525-5401 - (773) 525-5499 | 84 |
| (773) 525-55** | (773) 525-5500 - (773) 525-5598 | 73 |
| (773) 525-56** | (773) 525-5600 - (773) 525-5699 | 78 |
| (773) 525-57** | (773) 525-5700 - (773) 525-5798 | 82 |
| (773) 525-58** | (773) 525-5800 - (773) 525-5899 | 79 |
| (773) 525-59** | (773) 525-5900 - (773) 525-5998 | 78 |
US Phone Directory: (773) 525-5***
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