Area Code 410-390 located in BALTIMORE, BALTIMORE CITY, MD, more detail is as below. Place NPA (Numbering Plan Area) : 410 NXX (Local Number Prefix) : 390 City : BALTIMORE County : BALTIMORE CITY State : MD (Maryland) NXX Use Type : Wireless NXX Intro Version : 1996-10-15 FIPS (Federal Information Processing Standards) : 24510 LATA (Local Access Transport Area) : 242 Rate Center : BALTIMORE ZIP Code Count : 0 ZIP Code Frequency : Second most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 21233 Other Information NPANXX : 410390 Switch CLLI (Common Language Location Identifier) : PIVLMDPKDS1 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 : TELEPORT COMMUNICATIONS AMERICA, LLC - MD OCN (Operating Company Number) : 7325 Coverage Area Name : OCEAN CITY Latitude : 38.3311 Longitude : -75.0900 ‹ previous : 410-389 next › : 410-390 Telephone Number List 410-390-0000 ~ 410-390-9999