Area Code 301-232 located in BRINKLOW, MONTGOMERY, MD, more detail is as below. Place NPA (Numbering Plan Area) : 301 NXX (Local Number Prefix) : 232 City : BRINKLOW 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 : ASHTON ZIP Code Count : 0 ZIP Code Frequency : Second most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 20862 Other Information NPANXX : 301232 County Population : 0 Switch CLLI (Common Language Location Identifier) : BLTMMDDNDS0 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 : SANDY SPRING Latitude : 39.1521 Longitude : -77.0225 ‹ previous : 301-231 next › : 301-232 Telephone Number List 301-232-0000 ~ 301-232-9999