Area Code 301-792 located in OLNEY, MONTGOMERY, MD, more detail is as below. Place NPA (Numbering Plan Area) : 301 NXX (Local Number Prefix) : 792 City : OLNEY County : MONTGOMERY State : MD (Maryland) NXX Use Type : Wireless NXX Intro Version : 2000-06-13 FIPS (Federal Information Processing Standards) : 24031 LATA (Local Access Transport Area) : 236 Rate Center : WSHNGTNZN3 ZIP Code Count : 1 ZIP Code Frequency : 9 ZIP Code : 20832 Other Information NPANXX : 301792 County Population : 0 Switch CLLI (Common Language Location Identifier) : BTVLMD12CM1 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 : OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC OCN (Operating Company Number) : 6855 Coverage Area Name : SILVER SPRING Latitude : 39.0115 Longitude : -77.0405 ‹ previous : 301-792 next › : 301-792 Telephone Number List 301-792-0000 ~ 301-792-9999