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Endpoints for the AWS GovCloud (US) Regions
If you access AWS GovCloud (US-West) or AWS GovCloud (US-East) by using the command line interface (CLI) or programmatically by using the APIs, you need the AWS GovCloud (US-West) or AWS GovCloud (US-East) region endpoints. AWS GovCloud (US-West) and AWS GovCloud (US-East) uses FIPS 140-2 validated cryptographic modules to support compliance with FIPS 140-2 in all our HTTPS endpoints unless otherwise noted. For more information about FIPS 140-2, see "Cryptographic Module Validation Program" on the NIST Computer Security Resource Center website.
When using the endpoints, note the following:
-
Amazon S3 has the following website endpoint:
Website Endpoint Route 53 Hosted Zone ID s3-website-us-gov-west-1.amazonaws.com
Z31GFT0UA1I2HV
For a list of all AWS endpoints, see Regions and Endpoints in the AWS General Reference.
Endpoints for the AWS GovCloud (US) Regions
The following table lists each AWS service available in the AWS GovCloud (US) Regions and the corresponding endpoints.
| AWS Service | AWS GovCloud (US-West) Endpoints (FIPS, Non-FIPS) | AWS GovCloud (US-East) Endpoints (FIPS, Non-FIPS) | Protocol |
|---|---|---|---|
| Amazon AppStream 2.0 |
FIPS: appstream2-fips.us-gov-west-1.amazonaws.com Non-FIPS: appstream2.us-gov-west-1.amazonaws.com |
FIPS: Not Applicable Non-FIPS: Not Applicable |
HTTPS |
| Amazon API Gateway* |
FIPS: apigateway-fips.us-gov-west-1.amazonaws.com Non-FIPS: Not Applicable |
FIPS: Not Applicable Non-FIPS: Not Applicable |
HTTPS |
| Amazon Athena |
FIPS: athena-fips.us-gov-west-1.amazonaws.com Non-FIPS: athena.us-gov-west-1.amazonaws.com |
FIPS: athena-fips.us-gov-east-1.amazonaws.com Non-FIPS: athena.us-gov-east-1.amazonaws.com |
HTTPS |
| Amazon Aurora |
FIPS: rds.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: rds.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTPS |
| AWS Auto Scaling* |
FIPS: autoscaling.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: autoscaling.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTP and HTTPS |
| Amazon EC2 Auto Scaling |
FIPS: autoscaling.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: autoscaling.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTP and HTTPS |
| AWS Certificate Manager |
FIPS: Not applicable Non-FIPS: acm.us-gov-west-1.amazonaws.com |
FIPS: Not applicable Non-FIPS: acm.us-gov-east-1.amazonaws.com |
HTTPS |
| AWS Certificate Manager Private Certificate Authority |
FIPS: acm-pca.us-gov-west-1.amazonaws.com Non-FIPS:Not Applicable |
FIPS: acm-pca.us-gov-east-1.amazonaws.com Non-FIPS: Not Applicable |
HTTPS |
| Amazon Cloud Directory |
FIPS: clouddirectory.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
Not applicable |
HTTPS |
| AWS CloudFormation |
FIPS: cloudformation.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: cloudformation.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTPS |
| AWS CloudHSM |
FIPS: cloudhsmv2.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: cloudhsmv2.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTPS |
| AWS CloudHSM Classic |
FIPS: cloudhsm.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
Not applicable |
HTTPS |
| AWS CloudTrail |
FIPS: cloudtrail.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: cloudtrail.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTPS |
| Amazon CloudWatch |
FIPS: monitoring.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: monitoring.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTPS |
| Amazon CloudWatch Events |
FIPS: events.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: events.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTPS |
| Amazon CloudWatch Logs |
FIPS: logs.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: logs.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTPS |
| AWS CodeBuild |
FIPS: codebuild-fips.us-gov-west-1.amazonaws.com Non-FIPS: codebuild.us-gov-west-1.amazonaws.com |
FIPS: codebuild-fips.us-gov-east-1.amazonaws.com Non-FIPS: codebuild.us-gov-east-1.amazonaws.com |
HTTPS |
| AWS CodeCommit |
FIPS: codecommit-fips.us-gov-west-1.amazonaws.com FIPS: git-codecommit-fips.us-gov-west-1.amazonaws.com Non-FIPS: codecommit.us-gov-west-1.amazonaws.com |
FIPS: codecommit-fips.us-gov-east-1.amazonaws.com FIPS: codecommit.us-gov-east-1.amazonaws.com Non-FIPS: codecommit.us-gov-east-1.amazonaws.com |
HTTPS |
| AWS CodeDeploy |
FIPS: codedeploy-fips.us-gov-west-1.amazonaws.com Non-FIPS: codedeploy.us-gov-west-1.amazonaws.com |
FIPS: codedeploy-fips.us-gov-east-1.amazonaws.com Non-FIPS: codedeploy.us-gov-east-1.amazonaws.com |
HTTPS |
|
Amazon Comprehend |
FIPS: comprehend-fips.us-gov-west-1.amazonaws.com Non-FIPS: comprehend.us-gov-west-1.amazonaws.com |
Not applicable |
HTTPS |
|
AWS Config |
FIPS: config.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: config.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTPS |
|
AWS Config Rules |
FIPS: config.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: config.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTPS |
|
Amazon Comprehend |
FIPS: comprehend-fips.us-gov-west-1.amazonaws.com Non-FIPS: comprehend.us-gov-west-1.amazonaws.com |
FIPS: Not applicable Non-FIPS: Not applicable |
HTTPS |
| AWS DataSync |
FIPS: datasync-fips.us-gov-west-1.amazonaws.com Non-FIPS: datasync.us-gov-west-1.amazonaws.com |
FIPS: Not applicable Non-FIPS: Not applicable |
HTTPS |
| AWS Database Migration Service (DMS) |
FIPS: dms.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: dms.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTPS |
| AWS Direct Connect |
FIPS: Not applicable Non-FIPS: directconnect.us-gov-west-1.amazonaws.com |
FIPS: Not applicable Non-FIPS: directconnect.us-gov-east-1.amazonaws.com |
HTTPS |
| AWS Directory Service |
FIPS: ds-fips.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: ds-fips.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTPS |
| Amazon DynamoDB |
FIPS: dynamodb.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: dynamodb.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTP and HTTPS |
| Amazon DynamoDB Streams |
FIPS: ds-fips.us-gov-west-1.amazonaws.com Non-FIPS: ds.us-gov-west-1. |
FIPS: ds-fips.us-gov-east-1..amazonaws.com Non-FIPS: ds.us-gov-east-1. |
HTTP and HTTPS |
| AWS Elastic Beanstalk |
FIPS: elasticbeanstalk-fips.us-west-1.amazonaws.com FIPS: elasticbeanstalk-fips.us-west-2.amazonaws.com Non-FIPS: Not applicable |
FIPS: elasticbeanstalk-fips.us-east-1.amazonaws.com FIPS: elasticbeanstalk-fips.us-east-2.amazonaws.com Non-FIPS: Not applicable |
HTTPS |
| Amazon Elastic Block Store (Amazon EBS) |
FIPS: ec2.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: ec2.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTPS |
| Amazon Elastic Compute Cloud (Amazon EC2) |
FIPS: ec2.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: ec2.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTPS |
| Amazon Elastic Container Registry (Amazon ECR) |
FIPS: ecr-fips.us-gov-west-1.amazonaws.com Non-FIPS: ecr.us-gov-west-1.amazonaws.com |
FIPS: ecr-fips.us-gov-east-1.amazonaws.com Non-FIPS: ecr.us-gov-east-1.amazonaws.com |
HTTPS |
| Amazon Elastic Container Service (Amazon ECS) |
FIPS: ecs-fips.us-gov-west-1.amazonaws.com Non-FIPS: ecs.us-gov-west-1.amazonaws.com |
FIPS: ecs-fips.us-gov-east-1.amazonaws.com Non-FIPS: ecs.us-gov-east-1.amazonaws.com |
HTTP and HTTPS |
| Amazon Elastic File System |
FIPS: elasticfilesystem-fips.us-gov-west-1.amazonaws.com Non-FIPS: elasticfilesystem.us-gov-west-1.amazonaws.com |
Not applicable |
HTTPS |
| Amazon ElastiCache |
FIPS: elasticache.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: elasticache.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTPS |
| Elastic Load Balancing |
FIPS: elasticloadbalancing.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: elasticloadbalancing.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
HTTP and HTTPS |
| Amazon Elasticsearch Service |
FIPS: es-fips.us-gov-west-1.amazonaws.com Non-FIPS: es.us-gov-west-1.amazonaws.com |
FIPS: es-fips.us-gov-east-1.amazonaws.com Non-FIPS: es.us-gov-east-1.amazonaws.com |
HTTP and HTTPS |
| AWS Elemental MediaConvert |
FIPS: mediaconvert.us-gov-west-1.amazonaws.com Non-FIPS: mediaconvert.us-gov-west-1.amazonaws.com |
Not applicable |
HTTPS |
| Amazon EMR |
FIPS: elasticmapreduce.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: elasticmapreduce.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTPS |
| Amazon S3 Glacier |
FIPS: glacier.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: glacier.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTPS |
| AWS Glue |
FIPS: glue-fips.us-gov-west-1.amazonaws.com Non-FIPS: glue.us-gov-west-1.amazonaws.com |
FIPS: glue-fips.us-gov-east-1.amazonaws.com Non-FIPS: glue.us-gov-east-1.amazonaws.com |
HTTP and HTTPS |
| Amazon GuardDuty |
FIPS: guardduty.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
Not applicable |
HTTPS |
| AWS Health* |
FIPS:health.us-gov-west-1.amazonaws.com Non-FIPS:Not applicable |
Not applicable |
HTTPS |
| AWS Identity and Access Management (IAM) |
FIPS: iam.us-gov.amazonaws.com Non-FIPS: Not applicable |
FIPS: iam.us-gov.amazonaws.com Non-FIPS: Not applicable |
HTTPS |
| Amazon Inspector |
FIPS: inspector-fips.us-gov-west-1.amazonaws.com Non-FIPS: inspector.us-gov-west-1.amazonaws.com |
FIPS: inspector-fips.us-gov-east-1.amazonaws.com Non-FIPS: inspector.us-gov-east-1.amazonaws.com |
HTTP and HTTPS |
| AWS IoT Core |
FIPS: Not applicable Non-FIPS: iot.us-gov-west-1.amazonaws.com |
Not applicable |
HTTPS |
| AWS IoT Greengrass |
FIPS:
Non-FIPS:
|
Not applicable |
HTTPS |
| AWS IoT Device Management |
FIPS: Not applicable Non-FIPS: iot.us-gov-west-1.amazonaws.com |
Not applicable |
HTTPS |
| AWS IoT Device Defender |
FIPS: Not applicable Non-FIPS: iot.us-gov-west-1.amazonaws.com |
Not applicable |
HTTPS |
| AWS Key Management Service (AWS KMS) |
FIPS: kms-fips.us-gov-west-1.amazonaws.com Non-FIPS: kms.us-gov-west-1.amazonaws.com ** |
FIPS: kms-fips.us-gov-east-1.amazonaws.com Non-FIPS: kms.us-gov-east-1.amazonaws.com ** |
HTTPS |
| Amazon Kinesis Data Firehose |
FIPS: firehose-fips.us-gov-west-1.amazonaws.com Non-FIPS: firehose.us-gov-west-1.amazonaws.com |
FIPS: firehose-fips.us-gov-east-1.amazonaws.com Non-FIPS: firehose.us-gov-east-1.amazonaws.com |
HTTPS |
| Amazon Kinesis Data Streams |
FIPS: kinesis.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: kinesis.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTPS |
| AWS Lambda |
FIPS: lambda-fips.us-gov-west-1.amazonaws.com Non-FIPS: lambda.us-gov-west-1.amazonaws.com |
FIPS: lambda-fips.us-gov-east-1.amazonaws.com Non-FIPS: lambda.us-gov-east-1.amazonaws.com |
HTTP and HTTPS |
| AWS License Manager |
FIPS: license-manager-fips.us-gov-west-1.amazonaws.com Non-FIPS: license-manager.us-gov-west-1.amazonaws.com |
FIPS: license-manager-fips.us-gov-east-1.amazonaws.com Non-FIPS: license-manager.us-gov-east-1.amazonaws.com |
HTTP and HTTPS |
| AWS Elemental MediaConvert |
mediaconvert.us-gov-west-1.amazonaws.com |
mediaconvert.us-gov-west-1.amazonaws.com |
HTTPS |
| Amazon Neptune |
FIPS: rds.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: rds.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTPS |
| AWS Organizations |
FIPS: organizations.us-gov-west-1.amazonaws.com Non-FIPS: Not Applicable |
FIPS: Not Applicable Non-FIPS: Not applicable |
HTTPS |
| Amazon Polly |
FIPS: polly-fips.us-gov-west-1.amazonaws.com Non-FIPS: polly.us-gov-west-1.amazonaws.com |
Not applicable |
HTTPS |
| AWS Resource Access Manager |
FIPS: Not Applicable Non-FIPS: ram.us-gov-west-1.amazonaws.com |
FIPS: Not Applicable Non-FIPS: ram.us-gov-east-1.amazonaws.com |
HTTPS |
| AWS Resource Groups |
FIPS:elasticfilesystem-fips.us-gov-west-1.amazonaws.com Non-FIPS: Not Applicable |
FIPS: Not Applicable Non-FIPS: Not Applicable |
HTTPS |
| Amazon Redshift |
FIPS: redshift.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: redshift.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTPS |
| Amazon Rekognition |
FIPS: rekognition-fips.us-gov-west-1.amazonaws.com Non-FIPS: rekognition.us-gov-west-1.amazonaws.com |
Not applicable |
HTTPS |
| Amazon Relational Database Service (Amazon RDS) |
FIPS: rds.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: rds.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTPS |
| AWS Service Catalog (AWS Service Catalog) |
FIPS: servicecatalog-fips.us-gov-west-1.amazonaws.com Non-FIPS: servicecatalog.us-gov-west-1.amazonaws.com |
FIPS: Not Applicable Non-FIPS: Not applicable |
HTTPS |
| Amazon SageMaker |
FIPS: api.sagemaker.us-gov-west-1.amazonaws.com Non-FIPS: runtime.sagemaker.us-gov-west-1.amazonaws.com |
Not applicable |
HTTPS |
| Secrets Manager |
FIPS: secretsmanager-fips.us-gov-west-1.amazonaws.com Non-FIPS: secretsmanager.us-gov-west-1.amazonaws.com |
FIPS: Not Applicable Non-FIPS: Not applicable |
HTTPS |
| AWS Serverless Application Repository |
FIPS: serverlessrepo.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: serverlessrepo.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTPS |
| AWS Service Catalog |
FIPS: servicecatalog-fips.us-gov-west-1.amazonaws.com Non-FIPS: servicecatalog.us-gov-west-1.amazonaws.com |
Not applicable |
HTTPS |
| AWS Server Migration Service (AWS SMS) |
FIPS: sms-fips.us-gov-west-1.amazonaws.com Non-FIPS: sms.us-gov-west-1.amazonaws.com |
FIPS: sms-fips.us-gov-east-1.amazonaws.com Non-FIPS: sms.us-gov-east-1.amazonaws.com |
HTTP and HTTPS |
| Amazon Simple Storage Service (Amazon S3) |
FIPS: s3-fips.us-gov-west-1.amazonaws.com, s3.dualstack.us-gov-west-1.amazonaws.com *** Non-FIPS: s3.us-gov-west-1.amazonaws.com |
FIPS: s3-fips.us-gov-east-1.amazonaws.com, s3.dualstack.us-gov-east-1.amazonaws.com *** Non-FIPS: s3.us-gov-east-1.amazonaws.com |
HTTP and HTTPS |
| Amazon Simple Storage Service (Amazon S3) (website) |
FIPS: Not applicable Non-FIPS: s3-website-us-gov-west-1.amazonaws.com |
FIPS: Not applicable Non-FIPS: s3-website-us-gov-east-1.amazonaws.com |
HTTP |
| Amazon Simple Notification Service (Amazon SNS) |
FIPS: sns.us-gov-west-1.amazonaws.com Non-FIPS:Not applicable |
FIPS: sns.us-gov-east-1.amazonaws.com Non-FIPS:Not applicable |
HTTP and HTTPS |
| Amazon Simple Queue Service (Amazon SQS) |
FIPS: sqs.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: sqs.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTP and HTTPS |
| Amazon Simple Workflow Service (Amazon SWF) |
FIPS: swf.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: swf.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTPS |
| AWS Security Token Service (AWS STS) |
FIPS: sts.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: sts.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTPS |
| AWS Snowball | FIPS: FIPS is not needed. | Non-FIPS: snowball.us-gov-west-1.amazonaws.com | HTTPS |
| AWS Step Functions |
FIPS: Not applicable Non-FIPS: states.us-gov-west-1.amazonaws.com |
FIPS: Not applicable Non-FIPS: states.us-gov-east-1.amazonaws.com |
HTTPS |
| AWS Storage Gateway (AWS Storage Gateway) |
FIPS: Not applicable Non-FIPS: storagegateway.us-gov-west-1.amazonaws.com |
Not applicable |
HTTPS |
| AWS Support |
FIPS: support.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: Not applicable Non-FIPS: Not applicable |
HTTPS |
| AWS Systems Manager |
FIPS:ssm.us-gov-west-1.amazonaws.com Non-FIPS:Not applicable |
FIPS: ssm.us-gov-east-1.amazonaws.com Non-FIPS:Not applicable |
HTTPS |
| Amazon Transcribe |
FIPS: fips.transcribe.us-gov-west-1.amazonaws.com Non-FIPS: transcribe.us-gov-west-1.amazonaws.com |
Not applicable |
HTTPS |
| Amazon Translate |
FIPS: translate-fips.us-gov-west-1.amazonaws.com Non-FIPS: translate.us-gov-west-1.amazonaws.com |
Not applicable |
HTTPS |
| Amazon Virtual Private Cloud (Amazon VPC) |
FIPS: ec2.us-gov-west-1.amazonaws.com Non-FIPS: Not applicable |
FIPS: ec2.us-gov-east-1.amazonaws.com Non-FIPS: Not applicable |
HTTPS |
| AWS Management Console for the AWS GovCloud (US) Region |
FIPS: console.amazonaws-us-gov.com Non-FIPS: signin.amazonaws-us-gov.com |
FIPS: Not applicable Non-FIPS: console.amazonaws-us-gov.com signin.amazonaws-us-gov.com |
HTTP and HTTPS |
| AWS Management Console with Federation |
FIPS: Not applicable Non-FIPS: signin.amazonaws-us-gov.com/federation |
FIPS: Not applicable Non-FIPS: signin.amazonaws-us-gov.com/federation |
HTTPS |
| AWS Management Console with SAML |
FIPS: Not applicable Non-FIPS: signin.amazonaws-us-gov.com/saml |
FIPS: Not applicable Non-FIPS: signin.amazonaws-us-gov.com/saml |
HTTPS |
| AWS WAF |
FIPS: waf-regional-fips.us-gov-west-1.amazonaws.com Non-FIPS: waf-regional.us-gov-west-1.amazonaws.com |
Not applicable |
HTTPS |
| Amazon WorkSpaces |
FIPS: workspaces-fips.us-gov-west-1.amazonaws.com Non-FIPS: workspaces.us-gov-west-1.amazonaws.com |
Not applicable |
HTTPS |
For information about giving federated users single sign-on access to the AWS Management Console, see Giving Federated Users Direct Access to the AWS Management Console.
Note
* AWS Health is a non-fips endpoint (https://aws.amazon.com/compliance/fips/). We were cleared to not use fips because we do not share customer data (Health events are considered AWS data). FIPS endpoints have mandated encryptions applied to them.
* Amazon API Gateway edge-optimized API and edge-optimized custom domain name are not supported.
* Application Auto Scaling Scaling API and CLI are available. The AWS Auto Scaling console is not available. The AWS Auto Scaling API and command line interface (CLI) are not available.
* Amazon Route 53 hosted Zone ID for the regional endpoint in the AWS GovCloud (US) region is Z1K6XKP9SAGWDV.
*** Amazon S3 dual-stack endpoints support requests to S3 buckets over IPv6 and IPv4. For more information, see Using Dual-Stack Endpoints.
