If you came across ec2.web.eu-central-1.prod.diagnostic.networking.aws.dev and wondered if it's safe, the short answer is yes — but also that it's not a website you'd use. This domain is a subdomain of aws.dev, owned by Amazon, and its name suggests it's an internal diagnostic networking endpoint for their cloud infrastructure. The page itself returns a 404 error, which means there's no content to view or interact with.
For a site of this type, the lack of a privacy policy, contact information, or social media presence is completely normal. It's not a shop, a blog, or a service. The security setup is solid: a valid SSL certificate, no blacklisting, and a fast connection. The only real signal is that the domain is very new in the Wayback Machine, but that's expected for a technical endpoint that probably isn't meant to be publicly indexed.
So if you're doing a safety check or looking for reviews of ec2.web.eu-central-1.prod.diagnostic.networking.aws.dev, you can treat it as a harmless Amazon-owned address. It's not a scam, but it's also not a place to find information or do business. Just ignore it and move on.