Area Code 301-284 located in DERWOOD, MONTGOMERY, MD, more detail is as below. Place NPA (Numbering Plan Area) : 301 NXX (Local Number Prefix) : 284 City : DERWOOD County : MONTGOMERY State : MD (Maryland) NXX Use Type : Landline NXX Intro Version : 1997-01-11 FIPS (Federal Information Processing Standards) : 24031 LATA (Local Access Transport Area) : 236 Rate Center : WSNGTNZN10 ZIP Code Count : 1 ZIP Code Frequency : 50 ZIP Code : 20855 Other Information NPANXX : 301284 County Population : 0 Switch CLLI (Common Language Location Identifier) : RKVLMDMRDMD 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 : MCIMETRO ACCESS TRANSMISSION SERVICES LLC OCN (Operating Company Number) : 7229 Coverage Area Name : ROCKVILLE Latitude : 39.0867 Longitude : -77.1600 ‹ previous : 301-283 next › : 301-284 Telephone Number List 301-284-0000 ~ 301-284-9999
