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Phone Directory 773-978 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (773) 978-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
773-978 Chicago, IL Ameritech Illinois Cook Landline 10/15/1996

Other Series For Prefixes

773-9780###
773-9781###
773-9782###
773-9783###
773-9784###
773-9785###
773-9786###
773-9787###
773-9788###
773-9789###