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Phone Directory 301-640 Detail

State Major City Time Zone
Maryland Baltimore Eastern

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Example: (301) 640-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
301-640 Gaithersburg, MD Verizon Maryland Montgomery Landline 02/04/1994

Other Series For Prefixes

301-6400###
301-6401###
301-6402###
301-6403###
301-6404###
301-6405###
301-6406###
301-6407###
301-6408###
301-6409###