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Phone Directory 301-478 Detail

State Major City Time Zone
Maryland Baltimore Eastern

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Example: (301) 478-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
301-478 Oldtown, MD Verizon Maryland Allegany Landline 02/04/1994

Other Series For Prefixes

301-4780###
301-4781###
301-4782###
301-4783###
301-4784###
301-4785###
301-4786###
301-4787###
301-4788###
301-4789###