Area Code 503-275 located in PORTLAND, CLACKAMAS, OR, more detail is as below. Place NPA (Numbering Plan Area) : 503 NXX (Local Number Prefix) : 275 City : PORTLAND County : CLACKAMAS State : OR (Oregon) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 41005 LATA (Local Access Transport Area) : 672 Rate Center : PORTLAND ZIP Code Count : 1 ZIP Code Frequency : 2 ZIP Code : 97222 Other Information NPANXX : 503275 Switch CLLI (Common Language Location Identifier) : PTLDOR69DS0 MSA CBSA (Core Based Statistical Area) : Portland-Vancouver-Hillsboro, OR-WA MSA CBSA Code (Core Based Statistical Area) : 38900 Time Zone : Pacific (GMT -08:00) Observes Daylight Saving Time : Yes Company : QWEST CORPORATION OCN (Operating Company Number) : 9638 Coverage Area Name : PORTLAND Latitude : 45.5235 Longitude : -122.6751 ‹ previous : 503-275 next › : 503-275 Telephone Number List 503-275-0000 ~ 503-275-9999