Sixth AZ in US East (N. Virginia) Region

Six Availability Zones (AZs) are now available for customers in the US East (N. Virginia) Region. As customers in the US and across the globe continue to grow their usage of AWS, we will continue to expand our infrastructure to meet their needs. This launch brings AWS’s global AZ total to 44 AZs within 16 geographic Regions around the world, with announced plans for 14 more AZs and five more Regions.
Quelle: aws.amazon.com