• outline

Unexpted and undefined billing for Oregon(us-west-2) could be pricing from AWS Global Accelerator.

• Global Accelerator

"Global Accelerator is a global service that supports endpoints in multiple AWS Regions but you must specify the US West (Oregon) Region to create, update, or otherwise work with accelerators. That is, for example, specify --region us-west-2 on AWS CLI commands."

https://docs.aws.amazon.com/global-accelerator/latest/api/API_CreateAccelerator.html