Area Code 301-442 located in OLNEY, MONTGOMERY, MD, more detail is as below. Place NPA (Numbering Plan Area) : 301 NXX (Local Number Prefix) : 442 City : OLNEY County : MONTGOMERY State : MD (Maryland) NXX Use Type : Wireless NXX Intro Version : 1998-01-25 FIPS (Federal Information Processing Standards) : 24031 LATA (Local Access Transport Area) : 236 Rate Center : WSHNGTNZN3 ZIP Code Count : 1 ZIP Code Frequency : 12 ZIP Code : 20832 Other Information NPANXX : 301442 County Population : 0 Switch CLLI (Common Language Location Identifier) : BTVLMDCKCM3 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 : 301-442 next › : 301-442 Telephone Number List 301-442-0000 ~ 301-442-9999