| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (312) 943-20** | (312) 943-2000 - (312) 943-2098 | 49 |
| (312) 943-21** | (312) 943-2100 - (312) 943-2198 | 44 |
| (312) 943-22** | (312) 943-2200 - (312) 943-2298 | 47 |
| (312) 943-23** | (312) 943-2300 - (312) 943-2398 | 46 |
| (312) 943-24** | (312) 943-2400 - (312) 943-2495 | 44 |
| (312) 943-25** | (312) 943-2501 - (312) 943-2599 | 43 |
| (312) 943-26** | (312) 943-2600 - (312) 943-2699 | 47 |
| (312) 943-27** | (312) 943-2707 - (312) 943-2797 | 35 |
| (312) 943-28** | (312) 943-2800 - (312) 943-2898 | 35 |
| (312) 943-29** | (312) 943-2900 - (312) 943-2999 | 40 |
US Phone Directory: (312) 943-2***
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