Amazon Transcribe is an automatic speech recognition (ASR) service that makes it easy for you to add speech-to-text capabilities to your applications. Starting today, Amazon Transcribe becomes available in AWS US-West-1 Region.

from Recent Announcements https://aws.amazon.com/about-aws/whats-new/2019/06/amazon-transcribe-is-now-available-in-the-aws-us-west-n-california-region/