Area Code 301-351 located in GAITHERSBURG, MONTGOMERY, MD, more detail is as below. Place NPA (Numbering Plan Area) : 301 NXX (Local Number Prefix) : 351 City : GAITHERSBURG County : MONTGOMERY State : MD (Maryland) NXX Use Type : Wireless NXX Intro Version : 1995-07-04 FIPS (Federal Information Processing Standards) : 24031 LATA (Local Access Transport Area) : 236 Rate Center : WSHNGTNZN3 ZIP Code Count : 1 ZIP Code Frequency : 100 ZIP Code : 20882 Other Information NPANXX : 301351 County Population : 0 Switch CLLI (Common Language Location Identifier) : ANJTMDAHCM2 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 : CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD OCN (Operating Company Number) : 6395 Coverage Area Name : SILVER SPRING Latitude : 39.0115 Longitude : -77.0405 ‹ previous : 301-350 next › : 301-352 Telephone Number List 301-351-0000 ~ 301-351-9999