Area Code 503-305 located in PORTLAND, CLACKAMAS, OR, more detail is as below. Place NPA (Numbering Plan Area) : 503 NXX (Local Number Prefix) : 305 City : PORTLAND County : CLACKAMAS State : OR (Oregon) NXX Use Type : Landline NXX Intro Version : 1996-07-01 FIPS (Federal Information Processing Standards) : 41005 LATA (Local Access Transport Area) : 672 Rate Center : CLACKAMAS ZIP Code Count : 2 ZIP Code Frequency : 100 ZIP Code : 97222 Other Information NPANXX : 503305 Switch CLLI (Common Language Location Identifier) : PTLDORWNDS0 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 : MCIMETRO ACCESS TRANSMISSION SERVICES LLC OCN (Operating Company Number) : 7229 Coverage Area Name : PORTLAND Latitude : 45.5190 Longitude : -122.6756 ‹ previous : 503-304 next › : 503-306 Telephone Number List 503-305-0000 ~ 503-305-9999