Can't resolve any records for dynamodb.us-east-1.amazonaws.com
However, if you desperately need to access it you can force resolve it to 3.218.182.212. Seems to work for me. DNS through HN
curl -v --resolve "dynamodb.us-east-1.amazonaws.com:443:3.218.182.212" https://dynamodb.us-east-1.amazonaws.com/