Area Code 240-619 located in ANDREWS AIR FORCE BASE, PRINCE GEORGES, MD, more detail is as below. Place NPA (Numbering Plan Area) : 240 NXX (Local Number Prefix) : 619 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 : WSHNGTNZN5 ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 20762 Other Information NPANXX : 240619 County Population : 0 Switch CLLI (Common Language Location Identifier) : RSTNVABHDS3 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 : MCI WORLDCOM COMMUNICATIONS, INC. - MD OCN (Operating Company Number) : 7228 Coverage Area Name : CHEVY CHASE Latitude : 38.9458 Longitude : -77.0632 ‹ previous : 240-618 next › : 240-620 Telephone Number List 240-619-0000 ~ 240-619-9999