Area Code 585-340 located in EAST ROCHESTER, MONROE, NY, more detail is as below. Place NPA (Numbering Plan Area) : 585 NXX (Local Number Prefix) : 340 City : EAST ROCHESTER County : MONROE State : NY (New York) NXX Use Type : Landline NXX Intro Version : 2002-02-13 FIPS (Federal Information Processing Standards) : 36055 LATA (Local Access Transport Area) : 974 Rate Center : ROCHESTER ZIP Code Count : 1 ZIP Code Frequency : 3 ZIP Code : 14445 Other Information NPANXX : 585340 County Population : 0 Switch CLLI (Common Language Location Identifier) : ROCHNYEIDS0 MSA CBSA (Core Based Statistical Area) : Rochester, NY MSA CBSA Code (Core Based Statistical Area) : 40380 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : TW TELECOM OF NEW YORK L.P. - NY OCN (Operating Company Number) : 8473 Coverage Area Name : ROCHESTER Latitude : 43.1489 Longitude : -77.6117 ‹ previous : 585-340 next › : 585-340 Telephone Number List 585-340-0000 ~ 585-340-9999