Amazon Elastic Container Registry (ECR) now supports a 10x increase in the default limit for repositories per region per account to 100,000, up from the previous limit of 10,000. This change better aligns with your growth needs and saves you time from not having to request limit increases till 100,000 repositories. You still have the flexibility to adjust the new limit and request additional increases if you require more than 100,000 repositories per registry.
The new limit increase is already applied to your current registries and is available in all AWS commercial and Gov Cloud (US) regions. To learn more about default ECR service limits, please visit our documentation. You can learn more about storing, managing and deploying container images and artifacts with Amazon ECR, including how to get started, from our product page and user guide.
Source:: Amazon AWS