| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (773) 525-70** | (773) 525-7000 - (773) 525-7099 | 64 |
| (773) 525-71** | (773) 525-7100 - (773) 525-7198 | 60 |
| (773) 525-72** | (773) 525-7200 - (773) 525-7297 | 78 |
| (773) 525-73** | (773) 525-7300 - (773) 525-7398 | 69 |
| (773) 525-74** | (773) 525-7400 - (773) 525-7499 | 82 |
| (773) 525-75** | (773) 525-7500 - (773) 525-7599 | 72 |
| (773) 525-76** | (773) 525-7600 - (773) 525-7698 | 62 |
| (773) 525-77** | (773) 525-7700 - (773) 525-7799 | 67 |
| (773) 525-78** | (773) 525-7800 - (773) 525-7899 | 69 |
| (773) 525-79** | (773) 525-7900 - (773) 525-7999 | 57 |
US Phone Directory: (773) 525-7***
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