Area Code 636-209 located in FESTUS, JEFFERSON, MO, more detail is as below. Place NPA (Numbering Plan Area) : 636 NXX (Local Number Prefix) : 209 City : FESTUS County : JEFFERSON State : MO (Missouri) NXX Use Type : Wireless NXX Intro Version : 2003-02-09 FIPS (Federal Information Processing Standards) : 29099 LATA (Local Access Transport Area) : 520 Rate Center : FSSCRSTLCY ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 63028 Other Information NPANXX : 636209 Switch CLLI (Common Language Location Identifier) : STSLMOYQ3MD MSA CBSA (Core Based Statistical Area) : St. Louis, MO-IL MSA CBSA Code (Core Based Statistical Area) : 41180 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO OCN (Operating Company Number) : 5814 Coverage Area Name : CRYSTAL CITY Latitude : 38.2177 Longitude : -90.4014 ‹ previous : 636-209 next › : 636-212 Telephone Number List 636-209-0000 ~ 636-209-9999