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Phone Directory 331-999 Detail

State Major City Time Zone
Illinois Lemont Central

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Example: (331) 999-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
331-999 Oswego, IL Bandwidth.com Clec Kendall Landline 09/22/2010

Other Series For Prefixes

331-9990###
331-9991###
331-9992###
331-9993###
331-9994###
331-9995###
331-9996###
331-9997###
331-9998###
331-9999###