Area Code 240-684 located in RIVERDALE, PRINCE GEORGES, MD, more detail is as below. Place NPA (Numbering Plan Area) : 240 NXX (Local Number Prefix) : 684 City : RIVERDALE County : PRINCE GEORGES State : MD (Maryland) NXX Use Type : Landline NXX Intro Version : 2000-10-31 FIPS (Federal Information Processing Standards) : 24033 LATA (Local Access Transport Area) : 236 Rate Center : WSNG236Z13 ZIP Code Count : 0 ZIP Code Frequency : Second most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 20737 Other Information NPANXX : 240684 County Population : 0 Switch CLLI (Common Language Location Identifier) : CLPKMDBWDS0 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 : VERIZON MARYLAND, INC. OCN (Operating Company Number) : 9212 Coverage Area Name : GREENBELT Latitude : 38.9980 Longitude : -76.9017 ‹ previous : 240-683 next › : 240-684 Telephone Number List 240-684-0000 ~ 240-684-9999