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Phone Directory 301-231 Detail

State Major City Time Zone
Maryland Baltimore Eastern

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Example: (301) 231-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
301-231 Rockville, MD Verizon Maryland Montgomery Landline 02/04/1994

Other Series For Prefixes

301-2310###
301-2311###
301-2312###
301-2313###
301-2314###
301-2315###
301-2316###
301-2317###
301-2318###
301-2319###