Free IP API • No Auth Required • Developer-Friendly

The IP API Knowledge Base for Developers

Step-by-step tutorials, code examples, and guides for using IP geolocation APIs effectively. All examples use ipinfo.im — the free IP API that requires no authentication.

Browse Tutorials Try it free on ipinfo.im →
$ curl https://ipinfo.im/api/
{
  "ip": "8.8.8.8",
  "country": "US",
  "region": "California",
  "city": "Mountain View",
  "org": "AS15169 Google LLC",
  "timezone": "America/Los_Angeles"
}

Everything You Need to Work with IP APIs

What is ipinfo.im?

ipinfo.im is a free IP intelligence API that returns geolocation, ISP, ASN, and more for any IP address — with zero authentication required.

Free & No Auth

No API key, no registration, no rate-limit tiers. Just make an HTTP request and get structured JSON data back instantly.

10+ Network Tools

Beyond IP lookup: DNS lookup, WHOIS, ping, traceroute, port check, and more — all accessible via simple HTTP endpoints.

JSON API

Clean JSON responses, CORS-enabled, works from browsers and servers alike. Perfect for prototyping and production.

Latest Tutorials

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comparison API

Best Free IP APIs in 2026: ipinfo.im vs ipinfo.io vs ip-api.com

Comparing the top free IP geolocation APIs in 2026: ipinfo.im, ipinfo.io, and ip-api.com. We look at free tier limits, authentication requirements, response speed, data fields, and which is best for your use case.

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curl cheatsheet

IP API curl Cheatsheet: 10 Essential Commands

10 essential curl commands for IP address lookups using the ipinfo.im free API. Covers basic queries, field extraction, ASN lookup, bulk processing, and formatting — all copy-paste ready.

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Node.js JavaScript

IP Lookup with Node.js: Using the ipinfo.im Free API

Complete guide to IP address lookup in Node.js using the ipinfo.im free API. Covers native fetch, axios, async/await patterns, and an Express.js middleware example.

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Python geolocation

IP Geolocation in Python: A Complete Guide with Free API

Learn how to do IP geolocation in Python using the ipinfo.im free API. Includes complete code for single lookups, error handling, batch queries, and real-world use cases.

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getting-started API

Getting Started with the ipinfo.im IP API (Free, No Auth Required)

Learn how to use the ipinfo.im free IP lookup API. No API key needed — just make an HTTP request and get instant JSON data including country, city, ISP, and ASN.

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Ready to use the API?

ipinfo.im provides a free, no-auth IP lookup API. Get country, city, ISP, ASN, and more — instantly, with a single HTTP request.

Get Started → Live API Demo