Area Code 315-304 located in HENDERSON, JEFFERSON, NY, more detail is as below. Place NPA (Numbering Plan Area) : 315 NXX (Local Number Prefix) : 304 City : HENDERSON County : JEFFERSON State : NY (New York) NXX Use Type : Landline FIPS (Federal Information Processing Standards) : 36045 LATA (Local Access Transport Area) : 136 Rate Center : HENDERSON ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 13650 Other Information NPANXX : 315304 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 : HENDERSON Latitude : 43.8468 Longitude : -76.1801 ‹ previous : 315-303 next › : 315-305 Telephone Number List 315-304-0000 ~ 315-304-9999