Why Does My IP Address Change?
Your public IP address can change because most consumer and mobile networks assign addresses dynamically rather than permanently.
Updated 2026-08-08Common reasons
ISPs rotate dynamic addresses, routers reconnect, mobile devices move between networks, and VPNs route traffic through different exit nodes.
Cloud servers can also change public addresses when instances are recreated unless a reserved address is attached.
Static vs dynamic
A static address is intended to stay the same. A dynamic address is leased and can change when the lease renews or the network reconnects.
Static addresses are useful for allowlists, self-hosted services and consistent remote access, but they may cost more or require business service.
What to check
Use What Is My IP before and after connecting a VPN, restarting a router or changing networks. Use RDAP to see the network owner behind the current address.
Quick answers
Does a changing IP mean my device was hacked?
Usually no. Address changes are normal on dynamic ISP, VPN and mobile networks.