Area Code 513-204 located in MASON, WARREN, OH, more detail is as below. Place NPA (Numbering Plan Area) : 513 NXX (Local Number Prefix) : 204 City : MASON County : WARREN State : OH (Ohio) NXX Use Type : Landline NXX Intro Version : 2004-05-02 FIPS (Federal Information Processing Standards) : 39165 LATA (Local Access Transport Area) : 922 Rate Center : MASON ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 45040 Other Information NPANXX : 513204 Switch CLLI (Common Language Location Identifier) : MASNOHXA2MD MSA CBSA (Core Based Statistical Area) : Cincinnati-Middletown, OH-KY-IN MSA CBSA Code (Core Based Statistical Area) : 17140 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : CINCINNATI BELL EXTENDED TERRITORIES LLC - OH OCN (Operating Company Number) : 309B Coverage Area Name : MASON Latitude : 39.3577 Longitude : -84.3182 ‹ previous : 513-203 next › : 513-205 Telephone Number List 513-204-0000 ~ 513-204-9999