Area Code 503-999 located in SALEM, MARION, OR, more detail is as below. Place NPA (Numbering Plan Area) : 503 NXX (Local Number Prefix) : 999 City : SALEM County : MARION State : OR (Oregon) NXX Use Type : Wireless NXX Intro Version : 1999-10-13 FIPS (Federal Information Processing Standards) : 41047 LATA (Local Access Transport Area) : 672 Rate Center : SALEM ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 97303 Other Information NPANXX : 503999 Switch CLLI (Common Language Location Identifier) : PTLDORUFCM1 MSA CBSA (Core Based Statistical Area) : Salem, OR MSA CBSA Code (Core Based Statistical Area) : 41420 Time Zone : Pacific (GMT -08:00) Observes Daylight Saving Time : Yes Company : T-MOBILE USA, INC. OCN (Operating Company Number) : 6529 Coverage Area Name : SALEM Latitude : 44.9508 Longitude : -123.0138 ‹ previous : 503-999 next › : 504-200 Telephone Number List 503-999-0000 ~ 503-999-9999