What is a public IP address?
A public IP identifies an internet-facing connection. It may change and can represent a shared network.
Learn Networking
Useful explanations for students, website owners, home internet users and IT support teams.
IPv4 vs IPv6
IPv4 uses 32-bit addresses; IPv6 uses 128-bit addresses to support vastly more connections.
Understanding DNS records
A and AAAA records route domains to IP addresses; MX supports email; NS lists name servers; TXT stores text policies.
What does reverse DNS do?
A PTR lookup is commonly used to associate an IP address with a hostname.
Why is my IP location inaccurate?
Providers often report the ISP registration or routing location, not a person’s physical address.
How to troubleshoot DNS issues
Check the domain name, authoritative name servers and important DNS records before changing settings.