The main cities in Oregon and their area code are:
Portland: 503, 971, Salem: 503, 971, Eugene: 541, 458, Gresham: 503, 971 and Hillsboro: 503, 971.
The main airport is the Portland International Airport.
The main WhatsApp businesses are Professional Services like consulting and IT, Retail Trade such as food, clothing... Health Care and Social Assistance. You can contact these businesses with WhatsApp.