Who Is Hosting ThisWEBTOOLSHUB
Built by Konko Maji

See who hosts any domain

The IP addresses a domain resolves to, the hosting provider or cloud, the network owner, ASN, CIDR and reverse DNS, from authoritative RDAP. Free, instant, no signup.

Enter a full domain with its TLD. A bare name assumes .com. Hosting data comes from DNS plus authoritative RDAP.

Find where any site is hosted.

Enter a domain above to see its hosting provider, IPs and networks.

DNS + authoritative RDAP
Check the DNS too

A, AAAA, MX, NS, TXT, SOA and CAA records for any domain.

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POWER USER?

WebToolsHub CLI

The iphost command resolves the domain and looks up each IP in the registries, reporting the provider, network owner, ASN, CIDR and reverse DNS.

# where is this domain hosted, human readable
python cli.py iphost github.com

# full structured JSON (ips, provider, network owner, asn, cidr, reverse dns)
python cli.py iphost github.com --json
THE BIG DIFFERENCE

Find hosting from inside your AI

This tool is AI-native. It speaks the Model Context Protocol (MCP) and ships a REST API, one universal connector. Connect it once, then just ask your assistant where a domain is hosted or which cloud is behind it.

Claude ChatGPT Gemini Kimi Cursor
See the connection guide

How to find who is hosting a website

To find where a website is hosted you resolve its domain to the IP addresses it points to, then look up who owns each of those IP addresses. This tool does both. It reads the domain's DNS records, then queries the regional internet registries over RDAP to find the network owner, the hosting provider or cloud, the ASN, the CIDR block, the country and the reverse DNS for each IP.

How to run a hosting lookup

  1. Type the full domain (for example github.com) into the box above.
  2. Select Check. The hosting details appear in a few seconds.
  3. Read the detected provider and the IP addresses the domain resolves to.
  4. Open each IP to see the network owner, ASN, CIDR, country and reverse DNS.

What each field means

Why the provider may be a CDN, not the origin

Many sites sit behind a content delivery network or reverse proxy such as Cloudflare, Fastly or Akamai. In that case the IP addresses a domain resolves to belong to the CDN, so the provider you see is the CDN in front of the site rather than the origin server's own host. That is expected and it is exactly what a visitor's browser connects to. This tool reports what the domain actually resolves to and never invents an origin it cannot see.

How the lookup works: DNS plus RDAP

The tool first resolves the domain over DNS to collect its IP addresses. It then looks up each IP with RDAP (Registration Data Access Protocol), the IETF successor to legacy WHOIS, which serves authoritative registry data as structured JSON over HTTPS. That is how it reports the network owner, ASN, CIDR, country and type for every IP without guessing.

Frequently asked questions

How do I find out who is hosting a website?

Enter the domain and the tool resolves it to its IP addresses, then looks up each IP over RDAP to find the network owner, the hosting provider or cloud, the ASN, the CIDR block and the reverse DNS. That combination tells you where the site is actually hosted.

What does the hosting provider result mean?

The provider is the company that owns or operates the network the site's IP belongs to, such as Cloudflare, Amazon AWS, Google Cloud or Fastly. Many sites sit behind a CDN, so the provider you see may be the CDN in front of the origin rather than the origin server's own host.

Is the hosting lookup free and open source?

Yes. It is completely free and open source under the MIT license, part of WebToolsHub by Konko Maji. It resolves the domain over DNS and looks up each IP with authoritative RDAP over HTTPS. There is no signup and no data is stored.

What is an ASN and reverse DNS?

An ASN (Autonomous System Number) identifies the network operator that announces a block of IP addresses to the internet, so it points to the provider. Reverse DNS is the PTR record that maps an IP back to a hostname, which often reveals the data center, region or provider behind the IP.

Can I check hosting inside Claude, ChatGPT or Gemini?

Yes. It ships an MCP server and a REST API, one universal connector, so you can connect it to Claude, ChatGPT, Gemini, Kimi, Cursor and any MCP client, then ask your assistant where a domain is hosted for you. See the connection guide.