| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (312) 373-20** | (312) 373-2016 - (312) 373-2094 | 6 |
| (312) 373-21** | (312) 373-2110 - (312) 373-2196 | 7 |
| (312) 373-22** | (312) 373-2203 - (312) 373-2279 | 10 |
| (312) 373-23** | (312) 373-2309 - (312) 373-2395 | 9 |
| (312) 373-24** | (312) 373-2411 - (312) 373-2485 | 9 |
| (312) 373-25** | (312) 373-2502 - (312) 373-2576 | 10 |
| (312) 373-26** | (312) 373-2608 - (312) 373-2697 | 8 |
| (312) 373-27** | (312) 373-2714 - (312) 373-2793 | 5 |
| (312) 373-28** | (312) 373-2813 - (312) 373-2896 | 11 |
| (312) 373-29** | (312) 373-2925 - (312) 373-2993 | 8 |
US Phone Directory: (312) 373-2***
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