Hosting Detection Tool

Who Hosts This Website?

Instantly discover the hosting provider behind any domain, including IP, ASN, and data center.

Hosting Checker Chrome Extension

See who hosts any site you visit, directly from your browser toolbar. No copy-pasting required.

Chrome Add to Chrome

Instant Results

Cached responses deliver results in milliseconds.

Accurate Data

RDAP lookups with a curated ASN-to-host database.

100% Free

No signup, no API key, no limits on basic usage.

What is a Hosting Checker?

A hosting checker is a tool that lets you identify the web hosting provider behind any website. When you enter a domain name, the tool resolves the domain to its IP address, then performs a RDAP (Registration Data Access Protocol) or WHOIS lookup to determine which company owns that IP block and therefore hosts that website.

How Does Hosting Detection Work?

Every website on the internet is served from a physical or virtual server that has an IP address. These IP addresses are assigned to organizations (hosting companies, cloud providers, ISPs) in blocks, and this information is publicly registered in databases maintained by regional internet registries like ARIN, RIPE, and APNIC.

Our hosting checker performs the following steps:

  1. DNS Resolution: The domain name is resolved to its current IP address using DNS.
  2. RDAP Lookup: We query the IP address against RDAP (the modern replacement for WHOIS) to get ASN and organization data.
  3. Host Identification: The ASN (Autonomous System Number) is matched against our curated database of known hosting providers.

Common Hosting Providers You Might Find

Some of the most commonly detected hosting providers include:

  • Amazon Web Services (AWS) (AS14618, AS16509)
  • Google Cloud Platform (AS15169)
  • Microsoft Azure (AS8075)
  • Cloudflare (AS13335)
  • DigitalOcean (AS14061)
  • GoDaddy (AS26496)
  • Bluehost / EIG (AS46606)

Why Check Who Hosts a Website?

There are many legitimate reasons to check hosting information:

  • SEO Research: Understanding where competitor sites are hosted can inform infrastructure decisions.
  • Security Analysis: Identify if a suspicious site is hosted on known malicious infrastructure.
  • Migration Planning: Verify DNS propagation after moving a site to a new host.
  • Due Diligence: Research the infrastructure of a vendor or partner site.

Frequently Asked Questions

Is the hosting checker completely free?

Yes. Hosting Checker is completely free to use with no signup required. We fund the service through non-intrusive advertising.

Why might the result show Cloudflare instead of the actual host?

Many websites use Cloudflare as a CDN (Content Delivery Network) and DDoS protection layer. When this is the case, the website's DNS points to Cloudflare's IPs rather than the origin server's IP. Our tool will correctly identify Cloudflare as the front-end provider. You may need to check NS (nameserver) records to identify the actual hosting backend.

How often is the data updated?

Our results are cached for 5 minutes to improve response speed, but the underlying RDAP and WHOIS databases are queried in real-time. ASN and hosting provider mappings are updated regularly.

Can I check my own website?

Absolutely. Just enter your own domain name to verify what hosting provider appears in public records. This is especially useful after migrating to a new host.