What is an ASN? — A Simplified Explanation
An ASN is like an ID card for networks on the internet. Learn what Autonomous System Numbers are, why they matter, and how they keep the web connected.
Blog
Updates, notes, and build logs from IPGizmo.
What is Reverse DNS? — Explained Simply
Reverse DNS is like looking up a phone number in reverse — from IP address back to domain name. Learn what it is, why it matters, and how to check it.
How to Trace an IP Address (Legally)
Simple and legal ways to investigate an IP: ping, traceroute, WHOIS or RDAP, reverse DNS, ASN, and what to avoid.
IPv4 vs IPv6: What’s the Difference?
IPv4 is running out, IPv6 is here. Learn the key differences, why the internet needs both, and what it means for you.