How to use the Who Is Hosting This Site
- Enter a domain name such as
example.com. - Click Find host. The tool resolves its IP addresses, nameservers and mail servers.
- It looks up who owns each IP address (the network’s ASN) and reads the server’s response headers for platform hints.
- Read the web host, CDN, DNS provider and email provider, with the raw records below.
How hosting is detected
A website’s domain points to one or more IP addresses. Every IP belongs to a network with an ASN (autonomous system number) owned by a company — Amazon, Google, Hetzner, DigitalOcean and so on. That owner is usually the host. Many sites also send platform headers (Vercel, Netlify, Shopify, WP Engine, Kinsta, Webflow …) that name the real platform even when the IP belongs to a cloud provider.
Sites behind a CDN
When a site uses Cloudflare, Fastly or Akamai, its IP addresses belong to the CDN, not the server behind it. That hides the origin on purpose — it protects the server from attacks. In that case the tool tells you the CDN and any platform header it found, but the origin host can’t be seen from outside.
What else you get
- DNS provider from the nameservers (Cloudflare, Route 53, GoDaddy, Namecheap …).
- Email provider from the MX records (Google Workspace, Microsoft 365, Zoho …).
- IP range and country of the network, from the regional internet registry.
Related: Website Technology Checker (CMS and frameworks), WHOIS lookup and email DNS checker.
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Tools that pair well with the Who Is Hosting This Site
- Domain Availability Checker — Type a name to see at once whether it is free as .com, .net, .org, .io, .dev, .app, .ai and 7 more endings — or paste up to 20 domains to check in bulk.
- MIME Type Lookup — Search 200+ file extensions and MIME types — .webp, .woff2, .webmanifest, application/wasm … — or drop a file to detect its real type from its first bytes.
- Subnet Calculator — Enter an IP with a prefix (10.0.0.0/22) or a subnet mask (192.168.1.10 255.255.255.0) to get the network, broadcast, usable hosts and binary breakdown — and split it into subnets.
- URL Parser — Paste a URL to see every component and decoded query parameter — then edit, add or remove parameters and copy the rebuilt URL.