What Is an IP Address? Public vs Private, IPv4 vs IPv6 (Plain English)

Your IP address is your return address on the internet. Learn what it reveals (city, ISP), the difference between public and private IPs, and when to care.

Your return address on the internet

Every device online gets an IP (Internet Protocol) address so replies find their way back — like a return address on a letter. Your ISP assigns it when you connect; it can change when you switch networks or restart your router.

What it reveals about you

A public IP maps to roughly city level plus your ISP — never your street address. Sites use it for fraud checks, language defaults, and licensing regions. If a page shows the wrong city, that's normal IP-geolocation error, not hacking.

Public vs private in 20 seconds

Your router holds a public IP facing the internet and hands your devices private ones (192.168.x.x). This sharing trick is NAT. Find your public IP with our IP tool; find your private one in your device's Wi-Fi settings.

Test it now: run a live check → then re-read your result with this guide. Each check + guide read is another pageview that funds the free tool.

FAQ

Is my IP address private information?

Treat it casually but not publicly — it reveals your ISP and rough area. Streamers and forum posters should mask it.

Does my IP change?

Usually yes (dynamic). Restarting your router or switching networks typically rotates it.