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Phone Directory 312-242 Detail

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Illinois Chicago Central

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Example: (312) 242-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-242 Chicago, IL Teleport Communications America Cook Landline 08/20/2000

Other Series For Prefixes

312-2420###
312-2421###
312-2422###
312-2423###
312-2424###
312-2425###
312-2426###
312-2427###
312-2428###
312-2429###