# Amazon ECR endpoints and quotas
<a name="ecr"></a>

To connect programmatically to an AWS service, you use an endpoint. AWS services offer the following endpoint types in some or all of the AWS Regions that the service supports: IPv4 endpoints, dual-stack endpoints, and FIPS endpoints. Some services provide global endpoints. For more information, see [AWS service endpoints](rande.md).

Service quotas, also referred to as limits, are the maximum number of service resources or operations for your AWS account. For more information, see [AWS service quotas](aws_service_limits.md).

The following are the service endpoints and service quotas for this service.

## Service endpoints
<a name="ecr_region"></a>

The `ecr` and `api.ecr` endpoints are used for calls to the Amazon ECR API. API actions such as `DescribeImages` and `CreateRepository` go to this endpoint. While the two endpoints function the same, the `api.ecr` endpoint is recommended and the default when using the AWS CLI or AWS SDKs. When connecting to Amazon ECR through an AWS PrivateLink VPC endpoint, you must use the `api.ecr` endpoint to make API calls. For more information, see [Amazon ECR Interface VPC Endpoints (AWS PrivateLink)](https://docs.aws.amazon.com/AmazonECR/latest/userguide/vpc-endpoints.html) in the *Amazon Elastic Container Registry User Guide*.

For more information about FIPS endpoints, see [FIPS endpoints](rande.md#FIPS-endpoints).

[\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/general/latest/gr/ecr.html)

Additionally, the Amazon ECR API has dual-stack endpoints. The dual-stack endpoint was introduced in April 2025. To use the dual-stack endpoints with the AWS CLI, see the [Dual-stack and FIPS endpoints](https://docs.aws.amazon.com//sdkref/latest/guide/feature-endpoints.html) configuration in the *AWS SDKs and Tools Reference Guide*. The following lists the new endpoints:
+ OCI and Docker client requests:

  `<registry-id>.dkr-ecr.<aws-region>.on.aws`
+ AWS API requests:

  `ecr.<aws-region>.api.aws`

## Service quotas
<a name="limits_ecr"></a>

The following table provides the default limits for Amazon Elastic Container Registry (Amazon ECR).

[\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/general/latest/gr/ecr.html)

For more information, see [Amazon ECR Service Quotas](https://docs.aws.amazon.com/AmazonECR/latest/userguide/service-quotas.html) in the *Amazon Elastic Container Registry User Guide*.