| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (773) 221-00** | (773) 221-0000 - (773) 221-0099 | 73 |
| (773) 221-01** | (773) 221-0100 - (773) 221-0198 | 80 |
| (773) 221-02** | (773) 221-0200 - (773) 221-0299 | 77 |
| (773) 221-03** | (773) 221-0300 - (773) 221-0399 | 69 |
| (773) 221-04** | (773) 221-0400 - (773) 221-0499 | 77 |
| (773) 221-05** | (773) 221-0500 - (773) 221-0599 | 70 |
| (773) 221-06** | (773) 221-0600 - (773) 221-0699 | 72 |
| (773) 221-07** | (773) 221-0701 - (773) 221-0799 | 66 |
| (773) 221-08** | (773) 221-0800 - (773) 221-0898 | 68 |
| (773) 221-09** | (773) 221-0900 - (773) 221-0998 | 73 |
US Phone Directory: (773) 221-0***
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