Area Code 660-355 located in GREEN CASTLE, SULLIVAN, MO, more detail is as below. Place NPA (Numbering Plan Area) : 660 NXX (Local Number Prefix) : 355 City : GREEN CASTLE County : SULLIVAN State : MO (Missouri) NXX Use Type : Landline NXX Intro Version : 1998-01-25 FIPS (Federal Information Processing Standards) : 29211 LATA (Local Access Transport Area) : 524 Rate Center : MARTINSTN ZIP Code Count : 11 ZIP Code Frequency : 5 ZIP Code : 63544 Other Information NPANXX : 660355 Switch CLLI (Common Language Location Identifier) : MRTWMOXADS0 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : NORTHEAST MISSOURI RURAL TELEPHONE CO. OCN (Operating Company Number) : 1931 Coverage Area Name : WORTHINGTON Latitude : 40.4094 Longitude : -92.7651 ‹ previous : 660-355 next › : 660-355 Telephone Number List 660-355-0000 ~ 660-355-9999