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Hello,
EUC1-DataTransfer-Regional-Bytes identifies charges for data transfer between Availability Zones in the eu-central-1(Frankfurt) Region.
Do you have any workloads deployed to this region?
You can analyse using Cost explorer to do basic analyse which service incurs data transfer costs. Here is the article, https://aws.amazon.com/blogs/mt/using-aws-cost-explorer-to-analyze-data-transfer-costs/
To do more in depth analyses, you can enable VPC flow logs and query using Amazon Athena. This article shows you how you can do it: https://repost.aws/knowledge-center/vpc-find-traffic-contributors
answered 23 days ago
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