Area Code 315-203 located in ADAMS, JEFFERSON, NY, more detail is as below. Place NPA (Numbering Plan Area) : 315 NXX (Local Number Prefix) : 203 City : ADAMS County : JEFFERSON State : NY (New York) NXX Use Type : Landline NXX Intro Version : 12/18/2006 FIPS (Federal Information Processing Standards) : 36045 LATA (Local Access Transport Area) : 136 Rate Center : ADAMS ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 13605 Other Information NPANXX : 315203 County Population : 0 Switch CLLI (Common Language Location Identifier) : SYRCNYSUXFY MSA CBSA (Core Based Statistical Area) : Watertown-Fort Drum, NY MSA CBSA Code (Core Based Statistical Area) : 48060 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : TIME WARNER CABLE INFO SVCE (NEW YORK) LLC-NY OCN (Operating Company Number) : 532D Coverage Area Name : ADAMS Latitude : 43.8097 Longitude : -76.0220 ‹ previous : 315-202 next › : 315-204 Telephone Number List 315-203-0000 ~ 315-203-9999