Which cloud does an IP address belong to?

Big cloud and CDN providers publish the IP ranges their networks use, so customers can set up firewalls and allow lists. Those same lists tell you who runs an address you found in a log, an email header or a DNS record: a virtual server on Amazon Web Services, a site behind Cloudflare, a function on Google Cloud, and so on.

Tool description

Enter an IP address and press Check IP. If the address falls in a range one of the providers below publishes, you get:

  • The Provider
  • The IP range that holds the address, the most specific one listed
  • The Region or location, such as us-east-1, westeurope or Amsterdam, NL, when the provider names one
  • The Service, such as EC2, S3 or CLOUDFRONT for AWS, or OCI and OSN for Oracle, when the provider names one

The site downloads the lists again every 24 hours; Lists last updated shows when. The address isn't sent to any outside service, and it's never contacted itself.

AI assistants connected to the Rapid Tool Set MCP server can run the same check as cloud_cdn_ip_range_checker.

Covered providers

Provider Region shown
Amazon Web Services AWS region, plus the services
Google Cloud Google Cloud region
Microsoft Azure Azure region
Oracle Cloud OCI region, plus the services
DigitalOcean City and country of the data center
Cloudflare none (one global network)
Fastly none (one global network)

Good to know

  • A listed address belongs to the provider's network, but the server behind it is usually run by one of its customers.
  • Not listed only means none of these providers publishes a range holding the address. Other hosting providers, such as Hetzner or OVHcloud, aren't covered.