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Phone Directory 301-340 Detail

State Major City Time Zone
Maryland Baltimore Eastern

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
301-340 Rockville, MD Verizon Maryland Montgomery Landline 02/04/1994

Other Series For Prefixes

301-3400###
301-3401###
301-3402###
301-3403###
301-3404###
301-3405###
301-3406###
301-3407###
301-3408###
301-3409###