Area Code 301-213 located in ROCKVILLE, MONTGOMERY, MD, more detail is as below. Place NPA (Numbering Plan Area) : 301 NXX (Local Number Prefix) : 213 City : ROCKVILLE County : MONTGOMERY State : MD (Maryland) NXX Use Type : Wireless NXX Intro Version : 1997-07-06 FIPS (Federal Information Processing Standards) : 24031 LATA (Local Access Transport Area) : 236 Rate Center : WSHNGTNZN3 ZIP Code Count : 1 ZIP Code Frequency : 20 ZIP Code : 20852 Other Information NPANXX : 301213 County Population : 0 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 : SPRINT SPECTRUM L.P. OCN (Operating Company Number) : 6664 Coverage Area Name : BELTSVILLE Latitude : 39.0587 Longitude : -76.8903 ‹ previous : 301-213 next › : 301-213 Telephone Number List 301-213-0000 ~ 301-213-9999