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Phone Directory 301-721 Detail

State Major City Time Zone
Maryland Baltimore Eastern

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Example: (301) 721-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
301-721 Gaithersburg, MD Verizon Maryland Montgomery Landline 10/15/1996

Other Series For Prefixes

301-7210###
301-7211###
301-7212###
301-7213###
301-7214###
301-7215###
301-7216###
301-7217###
301-7218###
301-7219###