Area Code 307-663 located in NEWCASTLE, WESTON, WY, more detail is as below. Place NPA (Numbering Plan Area) : 307 NXX (Local Number Prefix) : 663 City : NEWCASTLE County : WESTON State : WY (Wyoming) NXX Use Type : Landline NXX Intro Version : 1996-01-10 FIPS (Federal Information Processing Standards) : 56045 LATA (Local Access Transport Area) : 640 Rate Center : W EDGEMONT ZIP Code Count : 1 ZIP Code Frequency : 5 ZIP Code : 82701 Other Information NPANXX : 307663 County Population : 0 Switch CLLI (Common Language Location Identifier) : EDMTSDXADS1 Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : Yes Company : GOLDEN WEST TEL COOP INC DBA GOLDEN WEST TELECOMM OCN (Operating Company Number) : 1659 Coverage Area Name : LANCE CREEK Latitude : 43.3004 Longitude : -103.8123 ‹ previous : 307-663 next › : 307-663 Telephone Number List 307-663-0000 ~ 307-663-9999