What is NAT and why does my house share one public IP?
NAT is why every device on home WiFi shows the same public IP on a what is my IP check. CGNAT is the ISP version. It does not hide you from IP lookup.
NAT means Network Address Translation. It is why a whole home can share one public IP address while every phone has its own 192.168 number. When you ask “what is my IP,” you want the public one, the address IP lookup and IP geolocation read.
What is NAT in plain language?
The router takes many private IPs and presents one (or a few) public IPv4 to the internet. Replies come back to the router. The router remembers which device asked. Without NAT, the world would have run out of IPv4 even faster.
Why does my public IP look the same on every device?
Because they share the router’s public address. Two browsers on the same WiFi show the same IPv4 on a what is my IP tool. That is normal. It is not a virus.
What is CGNAT?
Carrier grade NAT is NAT at the ISP. Mobile data often shares one public IPv4 with thousands of subscribers. Your “public IP” is not unique. Hosting a game from the phone usually fails. An IP tracker that pins a house to a mobile IP is guessing.
Does NAT hide my identity?
It hides the laptop’s private IP from websites. It does not hide the public IP, the ISP name, or cookies. HTTPS still rides on that public address. A VPN replaces the public IP a site sees. NAT does not.
If IPv6 is on, a device may have a globally routed address without that extra translator. Check both IPv4 and IPv6 when you test hide my IP. One protocol leaking undoes the other.