Area Code 301-994 located in CALLAWAY, SAINT MARYS, MD, more detail is as below. Place NPA (Numbering Plan Area) : 301 NXX (Local Number Prefix) : 994 City : CALLAWAY County : SAINT MARYS State : MD (Maryland) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 24037 LATA (Local Access Transport Area) : 236 Rate Center : LXTNPKGRML ZIP Code Count : 498 ZIP Code Frequency : 21 ZIP Code : 20620 Other Information NPANXX : 301994 County Population : 0 Switch CLLI (Common Language Location Identifier) : VYLEMDVLRS0 MSA CBSA (Core Based Statistical Area) : Lexington Park, MD MSA CBSA Code (Core Based Statistical Area) : 30500 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : VERIZON MARYLAND, INC. OCN (Operating Company Number) : 9212 Coverage Area Name : VALLEY LEE Latitude : 38.1877 Longitude : -76.5085 ‹ previous : 301-994 next › : 301-995 Telephone Number List 301-994-0000 ~ 301-994-9999