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Phone Directory 312-861 Detail

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Illinois Chicago Central

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Example: (312) 861-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-861 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-8610###
312-8611###
312-8612###
312-8613###
312-8614###
312-8615###
312-8616###
312-8617###
312-8618###
312-8619###