| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (773) 731-00** | (773) 731-0000 - (773) 731-0098 | 55 |
| (773) 731-01** | (773) 731-0100 - (773) 731-0199 | 70 |
| (773) 731-02** | (773) 731-0200 - (773) 731-0298 | 65 |
| (773) 731-03** | (773) 731-0300 - (773) 731-0398 | 71 |
| (773) 731-04** | (773) 731-0400 - (773) 731-0499 | 62 |
| (773) 731-05** | (773) 731-0500 - (773) 731-0599 | 70 |
| (773) 731-06** | (773) 731-0601 - (773) 731-0698 | 71 |
| (773) 731-07** | (773) 731-0700 - (773) 731-0799 | 63 |
| (773) 731-08** | (773) 731-0800 - (773) 731-0898 | 77 |
| (773) 731-09** | (773) 731-0901 - (773) 731-0999 | 70 |
US Phone Directory: (773) 731-0***
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