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Phone Directory 301-990 Detail

State Major City Time Zone
Maryland Baltimore Eastern

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
301-990 Gaithersburg, MD Verizon Maryland Montgomery Landline 02/04/1994

Other Series For Prefixes

301-9900###
301-9901###
301-9902###
301-9903###
301-9904###
301-9905###
301-9906###
301-9907###
301-9908###
301-9909###