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WorldIP.io

IPv4 Tools

Everything you need to investigate IPv4 addresses, ranges, networks, and organizations. All free, no signup required.

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IP Address Lookup

Look up any IPv4 address to find its owner, ASN, geolocation, reverse DNS, CIDR range, and blocklist status.

worldip.io/{ip} → e.g. /8.8.8.8
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What Is My IP?

Instantly see your public IP address, ISP, ASN, country, city, and reverse DNS. No logs, no signup.

/what-is-my-ip
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CIDR Range Lookup

Enter any CIDR block (e.g. 192.0.2.0/24) to see every IP in the range, the owner, ASN, and geographic distribution.

/range/{cidr} → e.g. /range/8.8.8.0/24
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ASN Search

Browse all Autonomous System Numbers. Find which ASNs belong to an ISP, cloud provider, or CDN, and see their IP ranges.

/asn/{number} → e.g. /asn/15169
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Organization Search

Find any organization's IPv4 allocations — total IPs owned, CIDR ranges, ASNs, and countries served.

/org/{slug} → e.g. /org/google-llc
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Country IPv4 Stats

See how IPv4 addresses are distributed across 250 countries. Drill down to regions and cities.

/country/{code} → e.g. /country/us

Additional resources

Global IPv4 statistics IPv4 exhaustion tracker Regional Internet Registries Organizations by category IPv4 vs IPv6 comparison Frequently asked questions

Learn the basics

What is an IP address? What is CIDR? What is an ASN? What is BGP? What is WHOIS? What is reverse DNS? What is a subnet mask? What is IPv4? What is IPv6?
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