Your public IP changes due to network adjustments or routing updates.
Your public IP changes due to network adjustments or routing updates.
Your public IP changes frequently because it's dynamically assigned by your internet service provider. This is normal behavior and usually not due to anything wrong with you or your setup. It can happen when you connect to different networks, use VPNs, or switch ISPs. Your router doesn't always stay on the same network, so the IP updates automatically. Don't worry—it's just how the internet works.
Typically ISPs assign IP addresses using DHCP or similar methods from a shared pool. Static IPs are uncommon outside business environments where extra fees apply. Unless you request a static address, you're unlikely to change it, and providers usually charge for it. For external server access, consider Dynamic DNS which updates a DNS entry when your IP changes. Then connect using the associated name instead of the IP. I rely on no-ip for my DDNS setup.