List of Area Codes in Illinois | ||
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217 Area Code | 309 Area Code | 618 Area Code |
779 Area Code | 815 Area Code |
County List of Area Code 224 | ||
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Cook Area code | Kane Area code | Lake Area code |
McHenry Area code |
County List of Area Code 312 |
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Cook Area code |
County List of Area Code 331 | ||
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DuPage Area code | Kane Area code | Cook Area code |
Will Area code | Kendall Area code |
County List of Area Code 630 | ||
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DuPage Area code | Kane Area code | Cook Area code |
Will Area code | Kendall Area code |
County List of Area Code 708 | ||
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Cook Area code | DuPage Area code | Will Area code |
County List of Area Code 773 |
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Cook Area code |
County List of Area Code 847 | ||
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Cook Area code | Kane Area code | Lake Area code |
McHenry Area code |
County List of Area Code 872 |
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Cook Area code |