| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (773) 966-50** | (773) 966-5000 - (773) 966-5099 | 92 |
| (773) 966-51** | (773) 966-5100 - (773) 966-5199 | 94 |
| (773) 966-52** | (773) 966-5200 - (773) 966-5299 | 79 |
| (773) 966-53** | (773) 966-5300 - (773) 966-5399 | 88 |
| (773) 966-54** | (773) 966-5400 - (773) 966-5499 | 84 |
| (773) 966-55** | (773) 966-5500 - (773) 966-5599 | 87 |
| (773) 966-56** | (773) 966-5600 - (773) 966-5697 | 86 |
| (773) 966-57** | (773) 966-5700 - (773) 966-5799 | 88 |
| (773) 966-58** | (773) 966-5800 - (773) 966-5899 | 85 |
| (773) 966-59** | (773) 966-5900 - (773) 966-5999 | 90 |
US Phone Directory: (773) 966-5***
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