Tutorials
Your API key works in development, but shipping it as-is to production is a security risk. This tutorial covers environment variables, backend proxies, CORS-based auth, and usage monitoring for the IPGeolocation.io API.
Guides
An ISP, or Internet Service Provider, is the company that gives you access to the internet and an ASN is a number that identifies one of the networks an ISP runs on the internet.
Guides
Unicast, broadcast, multicast, and anycast are four ways network traffic reaches its destination. This guide covers how each one works, when to use it, and how anycast routing affects IP geolocation accuracy.
Tutorials
Learn how to set up IP geolocation tracking in Google Tag Manager using the official IPGeolocation.io custom template. Covers API key setup, tag configuration, data layer variables, and practical use cases.
Tutorials
Learn how to use the IPGeolocation.io Astronomy API to get sunrise, sunset, moon phase, golden hour, and 50+ other data fields from a single API call.
Tutorials
The fastest path from zero to your first IP geolocation API call. Create an account, grab your API key, and make a working request with curl, Python, or JavaScript.
Guides
Learn how to set up geo redirects that route website visitors to localized pages based on their country. Includes JavaScript and PHP code, SEO guidance, and best practices.
Guides
A developer guide to blocking visitors by country, with working code in JavaScript, Python, and PHP, honest trade-offs between CDN, WAF, DNS, and application-level enforcement, and a real treatment of VPN and proxy bypass.
Guides
IP addresses identify every device on the internet, but most explanations barely scratch the surface. This guide covers how they work, IPv4 vs IPv6, address types, assignment chains, what your IP reveals through geolocation, and how to stay protected.
Guides
Bogons and martians overlap but aren't the same. A clear, RFC-grounded comparison that breaks down traditional bogons, fullbogons, and IPv6 bogons, with classification examples, filtering rules for routers, firewalls, and Linux, and notes on how geolocation APIs handle reserved IPs.
Guides
A geofeed is how network operators publish the real locations of their IP ranges so geolocation providers can stop guessing. This guide covers the RFC 8805 format, RFC 9632 discovery, per-RIR submission, and how to publish to IP geolocation providers.
Guides
An ASN (Autonomous System Number) is a unique identifier assigned to a network for internet routing via BGP. This guide explains ASN types, real-world examples, and how to look up ASN data for any IP address.