How does Google know my Public IP if my packets are modified by ISP’s NAT?

Question

So if my router’s packets are sent through the ISPs routers, then isn’t the source IP of that packet changed when it gets modified by ISP’s NAT? Shouldn’t that mean Google sees the source IP of that packet as the same as the last router’s IP? How does it know my personal router’s public IP?

In: 1

Answer 1

What does whatismyip.com say? That should show the IP on the outside of any NAT you’re behind. Compare this with what your router says its IP is; it should be somewhere on its web interface, often at http://192.168.0.1/