Area Code 623-321 located in PHOENIX, MARICOPA, AZ, more detail is as below. Place NPA (Numbering Plan Area) : 623 NXX (Local Number Prefix) : 321 City : PHOENIX County : MARICOPA State : AZ (Arizona) NXX Use Type : Landline NXX Intro Version : 2001-03-03 FIPS (Federal Information Processing Standards) : 04013 LATA (Local Access Transport Area) : 666 Rate Center : PHOENIX ZIP Code Count : 0 ZIP Code Frequency : Second most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 85013 Other Information NPANXX : 623321 Switch CLLI (Common Language Location Identifier) : PHNXAZMAX0X MSA CBSA (Core Based Statistical Area) : Phoenix-Mesa-Glendale, AZ MSA CBSA Code (Core Based Statistical Area) : 38060 Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : No Company : PAC - WEST TELECOMM, INC. - AZ OCN (Operating Company Number) : 2821 Coverage Area Name : PHOENIX Latitude : 33.4824 Longitude : -112.0713 ‹ previous : 623-313 next › : 623-321 Telephone Number List 623-321-0000 ~ 623-321-9999