Area Code 201-233 located in WESTFIELD, UNION, NJ, more detail is as below. Place NPA (Numbering Plan Area) : 201 NXX (Local Number Prefix) : 233 City : WESTFIELD County : UNION State : NJ (New Jersey) NXX Use Type : Wireless NXX Intro Version : 1997-04-01 FIPS (Federal Information Processing Standards) : 34039 LATA (Local Access Transport Area) : 224 Rate Center : CLIFFSIDE ZIP Code Count : 1 ZIP Code Frequency : 100 ZIP Code : 07090 Other Information NPANXX : 201233 County Population : 0 Switch CLLI (Common Language Location Identifier) : WAYNNJAWCMH MSA CBSA (Core Based Statistical Area) : New York-Northern New Jersey-Long Island, NY-NJ-PA MSA CBSA Code (Core Based Statistical Area) : 35620 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : OMNIPOINT COMMUNICATIONS, INC. - NJ OCN (Operating Company Number) : 6623 Coverage Area Name : CLIFFSIDE PARK Latitude : 40.8240 Longitude : -73.9883 ‹ previous : 201-232 next › : 201-234 Telephone Number List 201-233-0000 ~ 201-233-9999