Area Code 609-357 located in PRINCETON, MERCER, NJ, more detail is as below. Place NPA (Numbering Plan Area) : 609 NXX (Local Number Prefix) : 357 City : PRINCETON County : MERCER State : NJ (New Jersey) NXX Use Type : Landline NXX Intro Version : 2001-10-31 FIPS (Federal Information Processing Standards) : 34021 LATA (Local Access Transport Area) : 222 Rate Center : ALLENTOWN ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 08540 Other Information NPANXX : 609357 Switch CLLI (Common Language Location Identifier) : PRTNNJ31DS0 MSA CBSA (Core Based Statistical Area) : Trenton-Ewing, NJ MSA CBSA Code (Core Based Statistical Area) : 45940 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : LEVEL 3 COMMUNICATIONS, LLC - NJ OCN (Operating Company Number) : 4804 Coverage Area Name : PRINCETON Latitude : 40.3600 Longitude : -74.5985 ‹ previous : 609-356 next › : 609-358 Telephone Number List 609-357-0000 ~ 609-357-9999