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Phone Directory 301-780 Detail

State Major City Time Zone
Maryland Baltimore Eastern

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
301-780 Upper Marlboro, MD Verizon Maryland Prince Georges Landline 01/25/1998

Other Series For Prefixes

301-7800###
301-7801###
301-7802###
301-7803###
301-7804###
301-7805###
301-7806###
301-7807###
301-7808###
301-7809###