What Is an IP Address? A Complete Beginner’s Guide
A plain-language guide to IP addresses: how they work, public vs private, IPv4 vs IPv6, and how to check your public IP safely.
Read guide →Learn
Practical guides on IPs, routing, DNS, and network tools
Welcome to IPtoolbox Learn—short, practical guides that explain how the internet identifies devices and networks, then send you to free tools when you want to look something up.
Start with the cornerstone guides below, or jump straight to What Is My IP?, ASN Lookup, Bulk IP Lookup, or the IP Geolocation Map.
Guides
What Is an ASN? Autonomous System Numbers Explained
Understand Autonomous System Numbers, how they power internet routing, and how to use ASN lookup when investigating IPs or networks.
Read guide →What you’ll find here
Beginner IP basics
Public vs private addresses, IPv4/IPv6, and how to find your public IP without installing software.
Network identity
ASNs, WHOIS, bulk lookup, and how operators identify networks on the public internet.
Tools when you need them
Every guide links to free IPtoolbox utilities so you can check a real IP, ASN, or map location as you learn.