| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (773) 274-40** | (773) 274-4000 - (773) 274-4099 | 74 |
| (773) 274-41** | (773) 274-4100 - (773) 274-4199 | 76 |
| (773) 274-42** | (773) 274-4200 - (773) 274-4299 | 74 |
| (773) 274-43** | (773) 274-4300 - (773) 274-4396 | 71 |
| (773) 274-44** | (773) 274-4400 - (773) 274-4499 | 66 |
| (773) 274-45** | (773) 274-4500 - (773) 274-4599 | 71 |
| (773) 274-46** | (773) 274-4600 - (773) 274-4699 | 75 |
| (773) 274-47** | (773) 274-4700 - (773) 274-4798 | 69 |
| (773) 274-48** | (773) 274-4800 - (773) 274-4899 | 76 |
| (773) 274-49** | (773) 274-4900 - (773) 274-4999 | 72 |
US Phone Directory: (773) 274-4***
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