Free · without registration
Identify public hosting and CDN notices
Determine the publicly visible network infrastructure behind a domain. See IP networks, name servers and hints of upstream CDNs – with a clear demarcation to the actual hosting contract.
Which domain do you want to check?
Their results
Which provider is behind a website?
The domain is resolved via public DNS queries. For up to four found public IP addresses, the checker queries the announced network and its autonomous systems at RIPEstat. An AS refers to a routing unit on the Internet. Its operator is a proven infrastructure indication, but not necessarily the provider with whom the website operator has concluded his contract.
Differentiate hosters, registrars and DNS providers
The registrar manages the domain registration. Nameservers answer DNS queries. The web host or a platform delivers the website. These roles can lie with different companies. The tool shows nameservers and IP networks separately; registration data can be found in the linked WHOIS check. A nameserver name alone is not issued as a hoster.
CDNs can hide the original hoster
For known routing AS or characteristic CNAME targets, the result indicates upstream services such as Cloudflare, Fastly or Akamai. Then the original hoster remains open. It is not looking for a hidden origin IP. Even if no CDN is recognized, its use cannot be excluded. Recognition is a limited assignment of known signals, not a complete provider register.
How to use the results
Use the check for the technical inventory before a move or in case of unclear responsibilities. In addition, check the contractual partner in your access data and documents. Different IPv4 and IPv6 networks may be intended. The tool does not perform a port scan, location determination or retrieval of the actual website.
Sources and test limits
DNS data comes from Google Public DNS, routing and AS data from RIPEstat. Services may temporarily fail to respond or fail to provide assignment. These cases remain open and are not rated as a lack of hosting. The query does not use a paid data source.
Example of classification
A domain provides a Cloudflare IP. The result cites Cloudflare as an upstream infrastructure and leaves the original hoster open instead of giving Cloudflare as your hosting contract partner.
Frequent questions
Does the tool recognize every hoster?
No. Public DNS and routing data are visible. Resellers, platforms and upstream proxies may conceal the contractual partner.
Does it show the server location?
No. A network operator or his company address does not occupy a specific location of your server.
Is the website being scanned?
No. DNS and RIPEstat queries are executed, no ports are scanned and no website content is loaded.