| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (312) 279-90** | (312) 279-9001 - (312) 279-9063 | 4 |
| (312) 279-91** | (312) 279-9100 - (312) 279-9194 | 5 |
| (312) 279-92** | (312) 279-9200 - (312) 279-9221 | 5 |
| (312) 279-93** | (312) 279-9300 - (312) 279-9365 | 5 |
| (312) 279-94** | (312) 279-9400 - (312) 279-9483 | 4 |
| (312) 279-95** | (312) 279-9500 - (312) 279-9596 | 3 |
| (312) 279-96** | (312) 279-9600 - (312) 279-9692 | 3 |
| (312) 279-97** | (312) 279-9773 - (312) 279-9773 | 1 |
| (312) 279-99** | (312) 279-9919 - (312) 279-9919 | 1 |
US Phone Directory: (312) 279-9***
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