Area Code 520-204 located in TUCSON, PIMA, AZ, more detail is as below. Place NPA (Numbering Plan Area) : 520 NXX (Local Number Prefix) : 204 City : TUCSON County : PIMA State : AZ (Arizona) NXX Use Type : Landline NXX Intro Version : 2004-05-02 FIPS (Federal Information Processing Standards) : 04019 LATA (Local Access Transport Area) : 668 Rate Center : TUCSON ZIP Code Count : 0 ZIP Code Frequency : Second most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 85713 Other Information NPANXX : 520204 County Population : 0 Switch CLLI (Common Language Location Identifier) : TCSNAZEA1MD MSA CBSA (Core Based Statistical Area) : Tucson, AZ MSA CBSA Code (Core Based Statistical Area) : 46060 Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : No Company : MCLEODUSA TELECOMMUNICATIONS SERVICES, INC.- AZ OCN (Operating Company Number) : 7184 Coverage Area Name : TUCSON Latitude : 32.2276 Longitude : -110.9658 ‹ previous : 520-203 next › : 520-204 Telephone Number List 520-204-0000 ~ 520-204-9999