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Phone Directory 301-321 Detail

State Major City Time Zone
Maryland Baltimore Eastern

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Example: (301) 321-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
301-321 Rockville, MD Telcove Operations Montgomery Landline 07/06/1997

Other Series For Prefixes

301-3210###
301-3211###
301-3212###
301-3213###
301-3214###
301-3215###
301-3216###
301-3217###
301-3218###
301-3219###