Area Code 301-405 located in BALTIMORE, BALTIMORE CITY, MD, more detail is as below. Place NPA (Numbering Plan Area) : 301 NXX (Local Number Prefix) : 405 City : BALTIMORE County : BALTIMORE CITY State : MD (Maryland) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 24510 LATA (Local Access Transport Area) : 236 Rate Center : WSHNGTNZN4 ZIP Code Count : 1 ZIP Code Frequency : 5 ZIP Code : 21201 Other Information NPANXX : 301405 County Population : 0 Switch CLLI (Common Language Location Identifier) : CHCHMDBE6MD MSA CBSA (Core Based Statistical Area) : Baltimore-Towson, MD MSA CBSA Code (Core Based Statistical Area) : 12580 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : PAETEC COMMUNICATIONS, INC. - MD OCN (Operating Company Number) : 4716 Coverage Area Name : HYATTSVILLE Latitude : 38.9291 Longitude : -76.8772 ‹ previous : 301-405 next › : 301-405 Telephone Number List 301-405-0000 ~ 301-405-9999