Area Code 301-209 located in MOUNT RAINIER, PRINCE GEORGES, MD, more detail is as below. Place NPA (Numbering Plan Area) : 301 NXX (Local Number Prefix) : 209 City : MOUNT RAINIER County : PRINCE GEORGES State : MD (Maryland) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 24033 LATA (Local Access Transport Area) : 236 Rate Center : WSHNGTNZN4 ZIP Code Count : 70 ZIP Code Frequency : 11 ZIP Code : 20712 Other Information NPANXX : 301209 County Population : 0 Switch CLLI (Common Language Location Identifier) : HYVLMDHYDS0 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 Company : VERIZON MARYLAND, INC. OCN (Operating Company Number) : 9212 Coverage Area Name : HYATTSVILLE Latitude : 38.9567 Longitude : -76.9386 ‹ previous : 301-209 next › : 301-209 Telephone Number List 301-209-0000 ~ 301-209-9999