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Phone Directory 301-600 Detail

State Major City Time Zone
Maryland Baltimore Eastern

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
301-600 Frederick, MD Verizon Maryland Frederick Landline 07/06/2006

Other Series For Prefixes

301-6000###
301-6001###
301-6002###
301-6003###
301-6004###
301-6005###
301-6006###
301-6007###
301-6008###
301-6009###