Best Free IP Lookup Tools
Knowing your public IP address and understanding IP-based data is fundamental for network troubleshooting, security research, and web development. From simple "what is my IP" lookups to deep network intelligence, here are the best free tools.
tools.fun IP Lookup
The tools.fun IP lookup instantly shows your public IP address along with geolocation data, ISP information, and network details. The tool works without any input — visit the page and your information is displayed. You can also look up any IP address to get its geolocation, ASN, and organization data.
This is useful for verifying that your VPN is working (your IP should show the VPN server's location, not yours), checking which IP your server is exposing to the internet, and debugging location-based features in web applications.
whatsmyip.now — Quick IP Display
whatsmyip.now does one thing: show your public IP address in large, easy-to-read text. No extra data, no ads, no distractions. It is the fastest way to get your IP address when someone asks for it during a technical support call or when configuring firewall rules.
The simplicity is intentional. When you need your IP address, you need it now — not after scrolling past geolocation maps and ISP details.
ipinfo.io — Developer-Friendly API
ipinfo.io provides IP geolocation, ASN, company, carrier, and privacy detection data via a clean REST API. The free tier allows 50,000 requests per month — more than enough for development and small production use. The response includes city, region, country, coordinates, timezone, and whether the IP belongs to a VPN, proxy, or Tor exit node.
Developers commonly use ipinfo.io for server-side geolocation (showing local currency, language, or content), fraud detection (flagging connections from known VPN ranges), and analytics (understanding where users connect from).
Shodan — The Network Intelligence Engine
Shodan scans the entire internet and indexes every publicly accessible device and service. Search for an IP address and Shodan shows open ports, running services, SSL certificate details, known vulnerabilities, and historical data. For security professionals, Shodan reveals what your infrastructure exposes to the world.
The free tier provides limited search results and basic lookups. The paid membership ($49/month or one-time $49 for a lifetime hobbyist licence) unlocks full search, API access, and monitoring alerts. Even with the free tier, checking your own server's IP on Shodan is an eye-opening security exercise.
Command-Line IP Tools
For quick lookups without opening a browser: curl ifconfig.me returns your public IP. curl ipinfo.io returns JSON with full geolocation data. dig +short myip.opendns.com @resolver1.opendns.com uses DNS to find your public IP, which works even when HTTP is filtered.
For network diagnostics, traceroute (or tracert on Windows) shows the path packets take to reach a destination, revealing routing issues. nslookup and dig resolve domain names to IP addresses for DNS troubleshooting. Use the JSON Formatter to pretty-print the JSON output from IP lookup APIs.
VPN and Privacy Considerations
Your IP address reveals your approximate location and your ISP. A VPN masks this by routing traffic through a server in a different location. After connecting to a VPN, verify it is working by checking your IP with tools.fun/ip — the displayed location should match the VPN server, not your physical location. DNS leak tests (dnsleaktest.com) verify that your DNS queries are also routed through the VPN and not leaking to your ISP.
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