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CDN and hosting detector

See where a website is hosted, which network and content delivery service sit in front of it, and what software it runs on.

No signup · Results in ~40 seconds · Nothing stored except the shareable report

What we check and why

How we find the host

We resolve the website's IPv4 and IPv6 addresses, look up the network each belongs to through Team Cymru's public IP-to-ASN service, and read the reverse DNS name of the server. Together they usually reveal the hosting company or cloud platform. We then look for CDN fingerprints in response headers and network names: Cloudflare, Fastly, Amazon CloudFront, Akamai, Bunny, Vercel, Netlify, Azure Front Door, Google and Sucuri among others.

The technology detector adds the server software, CMS, frameworks and other services the site uses, so you get the full delivery chain from DNS to page.

Why it is useful to know

Inherited websites: find out where the site actually runs before you change agency or cancel a contract.
Data location: see whether traffic is served from an EU provider or a global CDN, a common question in GDPR records of processing.
Performance: a CDN caches pages close to visitors and often adds HTTP/2 or HTTP/3, compression and DDoS protection.
Troubleshooting: when the site is slow or unreachable, knowing the provider tells you whom to contact.
Due diligence: check what a supplier or competitor runs on.

Interpreting the results

When a CDN or proxy such as Cloudflare sits in front of a site, the IP addresses and network belong to the CDN, not to the origin server where the site is actually hosted. That is by design and hides the origin from attackers. In that case the hosting company may only be identifiable from other hints, such as headers or the CMS.

Shared hosting means many sites on one IP address, which is normal for small websites. A CDN is not essential for a local firm whose clients are nearby, but good managed hosting with caching, HTTP/2 and current TLS is.

Documenting what you find

Record the hosting provider, CDN, DNS provider and registrar in your IT documentation with the contract owner and renewal date. This list belongs in your records of processing too, since each provider handles visitor data. When something goes wrong, or when you change agency, this inventory saves hours of detective work. Review the inventory once a year, and whenever a contract renews, so that it reflects what is actually running rather than what was agreed years ago. It also helps you spot services nobody uses any more but which are still being paid for.

Frequently asked questions

Can you tell where a site behind Cloudflare is hosted?

Usually not. Cloudflare and similar services proxy traffic, so only their addresses are visible. That protects the origin server.

Does using a US CDN breach the GDPR?

Not automatically. It depends on the contract, the data processed and the transfer mechanism, such as the EU–US Data Privacy Framework or standard contractual clauses. Ask your data protection adviser.

What is an ASN?

An Autonomous System Number identifies a network on the internet, typically belonging to a hosting company, cloud provider or ISP.

Do I need a CDN?

Not necessarily for a local firm. It helps most with international visitors, traffic spikes and attack protection. Good hosting with caching often matters more.