Area Code 503-606 located in MONMOUTH, POLK, OR, more detail is as below. Place NPA (Numbering Plan Area) : 503 NXX (Local Number Prefix) : 606 City : MONMOUTH County : POLK State : OR (Oregon) NXX Use Type : Landline NXX Intro Version : 1996-01-10 FIPS (Federal Information Processing Standards) : 41053 LATA (Local Access Transport Area) : 672 Rate Center : DALLAS ZIP Code Count : 1200 ZIP Code Frequency : 74 ZIP Code : 97361 Other Information NPANXX : 503606 Switch CLLI (Common Language Location Identifier) : INDPOR58DS0 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 : QWEST CORPORATION OCN (Operating Company Number) : 9638 Coverage Area Name : INDEPENDENCE Latitude : 44.8518 Longitude : -123.2052 ‹ previous : 503-606 next › : 503-607 Telephone Number List 503-606-0000 ~ 503-606-9999