| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (773) 856-00** | (773) 856-0000 - (773) 856-0099 | 94 |
| (773) 856-01** | (773) 856-0100 - (773) 856-0199 | 98 |
| (773) 856-02** | (773) 856-0200 - (773) 856-0299 | 93 |
| (773) 856-03** | (773) 856-0300 - (773) 856-0399 | 96 |
| (773) 856-04** | (773) 856-0400 - (773) 856-0499 | 98 |
| (773) 856-05** | (773) 856-0500 - (773) 856-0599 | 98 |
| (773) 856-06** | (773) 856-0600 - (773) 856-0699 | 96 |
| (773) 856-07** | (773) 856-0700 - (773) 856-0799 | 96 |
| (773) 856-08** | (773) 856-0800 - (773) 856-0899 | 97 |
| (773) 856-09** | (773) 856-0900 - (773) 856-0999 | 92 |
US Phone Directory: (773) 856-0***
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