| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (312) 543-00** | (312) 543-0000 - (312) 543-0098 | 12 |
| (312) 543-01** | (312) 543-0103 - (312) 543-0198 | 25 |
| (312) 543-02** | (312) 543-0208 - (312) 543-0295 | 7 |
| (312) 543-03** | (312) 543-0306 - (312) 543-0398 | 21 |
| (312) 543-04** | (312) 543-0425 - (312) 543-0495 | 11 |
| (312) 543-05** | (312) 543-0521 - (312) 543-0582 | 4 |
| (312) 543-06** | (312) 543-0600 - (312) 543-0699 | 21 |
| (312) 543-07** | (312) 543-0700 - (312) 543-0770 | 17 |
| (312) 543-08** | (312) 543-0822 - (312) 543-0882 | 4 |
| (312) 543-09** | (312) 543-0917 - (312) 543-0992 | 5 |
US Phone Directory: (312) 543-0***
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