Area Code 405-999 located in CHICKASHA, GRADY, OK, more detail is as below. Place NPA (Numbering Plan Area) : 405 NXX (Local Number Prefix) : 999 City : CHICKASHA County : GRADY State : OK (Oklahoma) NXX Use Type : Landline NXX Intro Version : 12/2/2011 FIPS (Federal Information Processing Standards) : 40051 LATA (Local Access Transport Area) : 536 Rate Center : CHICKASHA ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 73018 Other Information NPANXX : 405999 MSA CBSA (Core Based Statistical Area) : Oklahoma City, OK MSA CBSA Code (Core Based Statistical Area) : 36420 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : FULLTEL, INC. OCN (Operating Company Number) : 4589 Coverage Area Name : CHICKASHA Latitude : 35.0501 Longitude : -97.9397 ‹ previous : 405-998 next › : 406-200 Telephone Number List 405-999-0000 ~ 405-999-9999