Area Code 240-348 located in ANDREWS AIR FORCE BASE, PRINCE GEORGES, MD, more detail is as below. Place NPA (Numbering Plan Area) : 240 NXX (Local Number Prefix) : 348 City : ANDREWS AIR FORCE BASE County : PRINCE GEORGES State : MD (Maryland) NXX Use Type : Landline NXX Intro Version : 2000-08-20 FIPS (Federal Information Processing Standards) : 24033 LATA (Local Access Transport Area) : 236 Rate Center : WSNGTNZN16 ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 20762 Other Information NPANXX : 240348 County Population : 0 Switch CLLI (Common Language Location Identifier) : RSTNVA91DS0 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 : LEVEL 3 COMMUNICATIONS, LLC - MD OCN (Operating Company Number) : 6119 Coverage Area Name : MOUNT RAINIER Latitude : 38.8842 Longitude : -77.0106 ‹ previous : 240-348 next › : 240-349 Telephone Number List 240-348-0000 ~ 240-348-9999