Area Code 605-749 located in NEWCASTLE, WESTON, SD, more detail is as below. Place NPA (Numbering Plan Area) : 605 NXX (Local Number Prefix) : 749 City : NEWCASTLE County : WESTON State : SD (South Dakota) NXX Use Type : Landline NXX Intro Version : 1996-01-10 FIPS (Federal Information Processing Standards) : 56045 LATA (Local Access Transport Area) : 654 Rate Center : ENEWCASTLE ZIP Code Count : 41 ZIP Code Frequency : 64 ZIP Code : 82701 Other Information NPANXX : 605749 Switch CLLI (Common Language Location Identifier) : NWCSWYXCDS0 Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : Yes Company : RT COMMUNICATIONS OCN (Operating Company Number) : 3410 Coverage Area Name : CUSTER Flags : The State for this record does not match the State for the ZIP Code. To keep with data reporting, the state for the Area Code is used. Latitude : 43.8528 Longitude : -104.2006 ‹ previous : 605-749 next › : 605-750 Telephone Number List 605-749-0000 ~ 605-749-9999