Starting today, Amazon EC2 X1 and X1e instances are available in additional AWS regions:

  • X1 instances are now available in the Asia Pacific (Hong Kong) AWS region.
  • X1e instances are now available in the Asia Pacific (Singapore) and US East (Ohio) AWS regions.

from Recent Announcements https://aws.amazon.com/about-aws/whats-new/2019/06/amazon-ec2-x1-and-x1e-instances-are-now-available-in-additional-aws-regions/