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Phone Directory 773-866 Detail

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Illinois Chicago Central

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Example: (773) 866-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
773-866 Chicago, IL Ameritech Illinois Cook Landline 10/15/1996

Other Series For Prefixes

773-8660###
773-8661###
773-8662###
773-8663###
773-8664###
773-8665###
773-8666###
773-8667###
773-8668###
773-8669###