Area Code 240-320 located in WALDORF, CHARLES, MD, more detail is as below. Place NPA (Numbering Plan Area) : 240 NXX (Local Number Prefix) : 320 City : WALDORF County : CHARLES State : MD (Maryland) NXX Use Type : Landline NXX Intro Version : 2000-10-31 FIPS (Federal Information Processing Standards) : 24017 LATA (Local Access Transport Area) : 236 Rate Center : WALDORF ZIP Code Count : 0 ZIP Code Frequency : Second most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 20603 Other Information NPANXX : 240320 County Population : 0 Switch CLLI (Common Language Location Identifier) : WASJDCDBDS1 MSA CBSA (Core Based Statistical Area) : Washington-Arlington-Alexandria, DC-VA-MD-WV MSA CBSA Code (Core Based Statistical Area) : 47900 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Overlay : L Company : CAVALIER EAST LLC - MD OCN (Operating Company Number) : 4820 Coverage Area Name : WALDORF Latitude : 38.6263 Longitude : -76.9039 ‹ previous : 240-319 next › : 240-320 Telephone Number List 240-320-0000 ~ 240-320-9999