Area Code 240-392 located in DISTRICT HEIGHTS, PRINCE GEORGES, MD, more detail is as below. Place NPA (Numbering Plan Area) : 240 NXX (Local Number Prefix) : 392 City : DISTRICT HEIGHTS County : PRINCE GEORGES State : MD (Maryland) NXX Use Type : Landline NXX Intro Version : 1999-02-27 FIPS (Federal Information Processing Standards) : 24033 LATA (Local Access Transport Area) : 236 Rate Center : WSHNGTNZN5 ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 20747 Other Information NPANXX : 240392 County Population : 0 Switch CLLI (Common Language Location Identifier) : LNHMMDADDS0 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 : STARPOWER COMMUNICATIONS, LLC - MD OCN (Operating Company Number) : 8832 Coverage Area Name : OXON HILL Latitude : 38.8093 Longitude : -77.0988 ‹ previous : 240-392 next › : 240-393 Telephone Number List 240-392-0000 ~ 240-392-9999