Area Code 301-596 located in BALTIMORE, BALTIMORE CITY, MD, more detail is as below. Place NPA (Numbering Plan Area) : 301 NXX (Local Number Prefix) : 596 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) : 238 Rate Center : LAUREL238 ZIP Code Count : 83 ZIP Code Frequency : 2 ZIP Code : 21203 Other Information NPANXX : 301596 County Population : 0 Switch CLLI (Common Language Location Identifier) : CLMAMDCBDS0 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 : VERIZON MARYLAND, INC. OCN (Operating Company Number) : 9212 Coverage Area Name : COLUMBIA Latitude : 39.2308 Longitude : -76.8581 ‹ previous : 301-596 next › : 301-596 Telephone Number List 301-596-0000 ~ 301-596-9999