Patrick Mevzek@sahil "If I understand correctly, NS for aws.amazon.com is a chain of CNAME(s) to actual NS domain?". No. It tells you `aws.amazon.com` has NO `NS` records, because it is a CNAME, and CNAME can not coexist with anything else. It then tells you the final destination of the CNAME, as there are 2, aka `dr49lng3n1n2s.cloudfront.net.` and then tells you that this name is delegated because it has `NS` records. So `aws.amazon.com` is not delegated (has no NS records), just pointed out externally.
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