IP Address & Networking Blog

Guides and tutorials on IP addresses, DNS, subnets, SSL and online privacy — from the team behind IPAddress-Lookup.com.

What Is an IP Address? A Complete Beginner's Guide

What an IP address is, how public and private IPs work, IPv4 vs IPv6, and what your IP reveals about you — explained simply.

IPv4 vs IPv6: What's the Difference (and Why It Matters)

IPv4 and IPv6 compared — address formats, why we're running out of IPv4, what IPv6 changes, and whether you need to do anything.

How to Hide Your IP Address: VPN, Proxy & Tor Compared

Why and how to hide your IP address, with an honest comparison of VPNs, proxies, and Tor — and which is right for you.

What Is DNS and How Does It Work?

DNS is the internet's phonebook. Learn how domain names resolve to IP addresses, the main record types, and why DNS matters.

IP Blacklists Explained: Why You're Listed and How to Get Delisted

What DNS blacklists are, why an IP gets listed, how listings hurt email deliverability, and a step-by-step guide to getting delisted.

Subnetting and CIDR Notation Explained (with Examples)

Subnets and CIDR made simple — subnet masks, /24 vs /26, network and broadcast addresses, and worked examples you can follow.

SSL Certificates and HTTPS Explained

How SSL/TLS certificates and HTTPS keep the web secure — the handshake, certificate authorities, types, expiry, and how to check a cert.