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Website Hosting Checker
Find out who is hosting a website: the network behind each of its IP addresses, the CDN in front of it if there is one, and who runs its DNS and its email — read from public DNS records, without ever visiting the site.
A domain, a subdomain or a full URL — we look up exactly the name you type.
How the checker finds the host
A website’s name points at one or more IP addresses through its A and AAAA records, sometimes by way of a CNAME to a platform’s own name first. Every public address belongs to a block that one network announces to the rest of the internet, identified by its autonomous system number. That network is the company whose servers answer for the site.
The checker reads those records, then asks Team Cymru’s public IP-to-ASN mapping which network announces each address and what it is called. When the network is a CDN such as Cloudflare, Fastly or Akamai, it says so: the CDN answers for the site, and the server behind it is deliberately not public.
The name servers and mail servers come from the registered domain’s NS and MX records. The registrar the domain was bought from is a different record; the Domain Age Checker reads it, and the DR checker shows the Ahrefs Domain Rating every site on the ranking is ordered by.
Website hosting questions
How do I find out who is hosting a website?
Type its domain or paste any URL from it. The checker looks up the IP addresses the site's name points to, then asks which network announces each address on the internet. That network belongs to the company whose servers answer for the site — the hosting provider, as far as public records can tell.
Why does it say the site is behind a CDN?
Services such as Cloudflare, Fastly and Akamai sit in front of a site and answer on its behalf, so its addresses belong to them rather than to the server the site really runs on. That origin server is deliberately hidden, and no public record names it. The checker tells you when that is the case instead of calling the CDN the host.
Is the hosting provider the same as the domain registrar?
Not necessarily. The registrar is where the domain name was bought and is renewed; the host is where the website's files are served from; the DNS provider runs the name servers; and the email provider receives its mail. One company can do all four, but they are often four different ones. The Domain Age Checker shows the registrar.
Does the country show where the server is?
No. It is the country the network's address block is registered to with its regional internet registry. A provider registered in the United States can run servers on every continent, so treat it as the provider's home rather than the machine's location.
Why do example.com and www.example.com show different hosts?
They are separate names with separate records, and they can point anywhere. The checker looks up exactly the name you type, subdomain included. If a bare domain has no address of its own but its www name does, it shows the www addresses and says so.
Does the checker visit the website?
No. Every answer comes from DNS: the site's own address, name server and mail records, and Team Cymru's public IP-to-network mapping. Nothing connects to the site's server, and nothing about the check is stored.