Area Code 240-280 located in HALETHORPE, BALTIMORE, MD, more detail is as below. Place NPA (Numbering Plan Area) : 240 NXX (Local Number Prefix) : 280 City : HALETHORPE County : BALTIMORE State : MD (Maryland) NXX Use Type : Landline NXX Intro Version : 2001-03-03 FIPS (Federal Information Processing Standards) : 24005 LATA (Local Access Transport Area) : 236 Rate Center : LAUREL ZIP Code Count : 0 ZIP Code Frequency : Second most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 21227 Other Information NPANXX : 240280 County Population : 0 Switch CLLI (Common Language Location Identifier) : CHCHMDBE7MD 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 Overlay : L Company : COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD OCN (Operating Company Number) : 107D Coverage Area Name : LAUREL Latitude : 39.1101 Longitude : -76.8514 ‹ previous : 240-279 next › : 240-280 Telephone Number List 240-280-0000 ~ 240-280-9999