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Phone Directory 240-399 Detail

State Major City Time Zone
Maryland Baltimore Eastern

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
240-399 Chevy Chase, MD Xo Maryland Montgomery Landline 10/13/1999

Other Series For Prefixes

240-3990###
240-3991###
240-3992###
240-3993###
240-3994###
240-3995###
240-3996###
240-3997###
240-3998###
240-3999###