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I want to get a notification when Amazon Simple Storage Service (Amazon S3) changes its IP address.
Create an Amazon Simple Notification Service (Amazon SNS) subscription, and then subscribe to the following SNS topic:
arn:aws:sns:us-east-1:806199016981:AmazonIpSpaceChanged
Note: For more information on this SNS topic, see Subscribe to AWS public IP address changes through Amazon SNS.
After you configure the SNS subscription, you receive a notification every time there's a change to the JSON file that contains AWS IP address ranges. To check for updated Amazon S3 IP addresses, filter the JSON file.
AWS IP address ranges