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Cloud IP Range Lookup

Check whether an IP address belongs to AWS, GCP, or Cloudflare by matching against each provider's official published prefix lists.

Examples:

Enter an IP address to find which cloud provider owns it

Related Tools

IP Geolocation

Look up location, ISP, ASN, timezone, and proxy detection for any IP address.

ASN / BGP Lookup

Look up an Autonomous System Number to see the organisation and all announced IP prefixes. Also resolves any IP address to its ASN.

Cloud VPC Planner

Plan your cloud network layout for AWS, Azure, or GCP. Define subnets, get provider-aware usable host counts, and generate ready-to-run CLI commands and Terraform HCL.

About this tool

Cloud IP Range Lookup checks whether an IP address belongs to a major cloud provider by comparing it against their official published prefix lists. AWS publishes ip-ranges.amazonaws.com/ip-ranges.json, GCP publishes gstatic.com/ipranges/cloud.json, and Cloudflare publishes cloudflare.com/ips-v4, all maintained by each provider and updated when their infrastructure changes.

Common uses include confirming that CDN traffic is genuinely coming from the claimed provider, diagnosing firewall rules that need to allow cloud service CIDRs, and identifying the origin of requests in access logs. The result includes the matched CIDR block, the specific service (e.g. EC2, CLOUDFRONT, Google Cloud), and the region where applicable.

Azure IP ranges are not included. Microsoft's range list URL changes weekly, making stable caching impractical. AWS, GCP, and Cloudflare all use stable, permanent endpoints. IP range lists are cached for 24 hours.