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Phone Directory 301-310 Detail

State Major City Time Zone
Maryland Baltimore Eastern

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Example: (301) 310-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
301-310 Columbia, MD Verizon Maryland Howard Landline 07/01/1996

Other Series For Prefixes

301-3100###
301-3101###
301-3102###
301-3103###
301-3104###
301-3105###
301-3106###
301-3107###
301-3108###
301-3109###