Area Code 831-204 located in MONTEREY, MONTEREY, CA, more detail is as below. Place NPA (Numbering Plan Area) : 831 NXX (Local Number Prefix) : 204 City : MONTEREY County : MONTEREY State : CA (California) NXX Use Type : Landline NXX Intro Version : 4/2/2008 FIPS (Federal Information Processing Standards) : 06053 LATA (Local Access Transport Area) : 736 Rate Center : MONTEREY ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 93943 Other Information NPANXX : 831204 MSA CBSA (Core Based Statistical Area) : Salinas, CA MSA CBSA Code (Core Based Statistical Area) : 41500 Time Zone : Pacific (GMT -08:00) Observes Daylight Saving Time : Yes Company : YMAX COMMUNICATIONS CORP. - CA OCN (Operating Company Number) : 258E Coverage Area Name : MONTEREY Latitude : 36.6002 Longitude : -121.8923 ‹ previous : 831-203 next › : 831-205 Telephone Number List 831-204-0000 ~ 831-204-9999