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Need to know who hosts a site? This hosting checker helps you find out. Enter the domain, a URL, or a public IP to see the web host inferred from the network that owns the addresses, plus server location and hints about who runs DNS and mail. When a content delivery network or proxy such as Cloudflare sits in front, we say so — the actual host may stay hidden.
Inferred from ASN / network organization
Paste a hostname, a full URL, or a public IPv4/IPv6 address. For names we resolve A/AAAA records, enrich each IP with DB-IP Lite (country, city, ASN, organization), read NS and MX for provider hints, and may read an HTTP Server header over HTTPS. We also flag common CDNs and edge networks when the visible address looks like a front. The host name is inferred from network ownership — not a guarantee of the retail host brand. Pasted IPs skip name resolution; NS and MX hints show as N/A.
1 target per run · 10 domains per day.
One of the ways to find the web host behind a website is to paste a name or IP and read the network that serves it — plus the operators who run DNS and mail beside it.
example.com). One target per run.Chrome extension
Install the free Karma Domains Chrome extension to see domain age and Karma Metric on SERPs — and run Checks from the popup.
This online tool answers which network appears to serve the site. It is not a catalog of every hosting plan and not a substitute for a registration record of the website owner. Many websites share a platform; the retail label can differ from the network we can see.
We resolve the domain’s A and AAAA records (or enrich a pasted IP), then read ASN and organization from DB-IP Lite for each address. That organization is usually the website host, cloud platform, or CDN that owns the address block — not always the brand on the invoice (resellers are common). Web developers use this domain lookup to read the hosting environment before a migration or purchase.
The registrar sells the domain name. The web hosting company is where websites are stored and served. They are often different companies. To see the registrar or registrant, use our WHOIS lookup — it usually does not name the firm that hosts your website. Expiry dates stay on Domain Expiry. Shared hosting, cloud hosting, and managed WordPress platforms can share one provider’s address space; we report the network we can see, not the retail plan type.
If the site is using a CDN, the domain name system is what the public sees: the domain’s DNS records usually point at the content delivery network, not the origin server. CDNs often add DDoS protection and can change site performance, but they also hide the origin. We flag that case when the network or headers look like a known front or reverse proxy. We do not uncover a hidden origin IP, so the actual hosting provider may stay out of sight.
NS patterns suggest who runs DNS for the name. MX patterns suggest email services, which can differ from the web host — including professional email on a separate platform. That split is common when multiple websites share one account. On domain checks we may also read the HTTP Server header (for example nginx or Apache) when the site sends one; that is self-reported software, not proof of the billing host. Hosting services and web hosting services are often split this way: one vendor for the site, another for mail, a third for nameservers.
We do not maintain a host brand directory, run IP blacklists, or export PDF reports. We do not recommend paid plans or rank hosting companies. We do not replace the full geo/PTR view or the full zone record set on our other free tools. We cannot see into private cloud infrastructure when the only public address belongs to a CDN or edge network.
The hosting provider inferred from the ASN and organization of the site’s public IPs, approximate server location in the IP table, nameserver and mail hints from NS/MX patterns (on domain checks), an optional HTTP Server header, and an edge note when the visible network looks like a front.
Address, NS, and MX answers from public resolvers, optional HTTPS response headers (including Server when sent), plus country, city, ASN, and organization from DB-IP Lite. We credit IP geolocation by DB-IP, licensed CC BY 4.0. We do not invent a retail host brand when the database only knows the upstream network.
Because public name records often point at the CDN or edge. The origin host is often hidden. We show the visible network and say so — we do not bypass that protection.
Not always. Resellers and managed hosts may run on AWS, Google Cloud, or Hetzner address space. A web hosting provider may sell the plan while the site sits on someone else’s network. We report the network owner we can see from DB-IP / ASN data.
That tool answers “what is this IP / which IPs does this name use?” with geo, ASN, and PTR. This page answers “who is hosting this website?” with a provider-first layout, NS/MX hints, optional Server header, and a CDN / edge note.
That page runs a DNS lookup to find the wider record set across resolvers. This page focuses on hosting inference from web IPs plus NS/MX provider hints and CDN detection.
No signup for the free tier. Limits match other Karma landing-tools: 1 target per run and the shared free daily domain limit of 10 per day (a domain or IP counts as one unit).
Upgrade to the Pro plan for higher limits inside Karma.Domains.
Yes — the Karma Domains Chrome extension adds age and Karma Metric on SERPs and runs Checks from the popup.
Alongside this free check, the full list of expired domains from 49 lists across 32 platforms (auctions, drops and buy-now listings) is on the Karma.Domains homepage, updated hourly.
See domain age and Karma Metric on SERPs — and run Checks from the popup. Free on the Chrome Web Store.