Why Does My IP Address Keep Changing?

Most consumer ISPs use dynamic addressing, so a public IP can change after a lease renewal, reconnection, or network maintenance.

How it works

Your router asks the provider for an address and the provider assigns one from an available pool. The same address can remain for a long time, but it is not guaranteed. Mobile networks and carrier-grade NAT make changes more frequent. A VPN also changes the address visible to websites whenever you choose a different exit server.

Power outages, router restarts, planned maintenance, and expired leases can all trigger a reassignment. Carrier-grade NAT can also mean a shared public address changes independently of your device's local network address.

For remote access, avoid building a workflow that assumes a household address never changes. A documented hostname, authenticated remote-access service, or provider-supported static option is usually easier to maintain.

Practical guidance

• Use a hostname or dynamic-DNS service for a device that needs a stable name.
• Ask your ISP about static-IP options if you have a genuine business need.
• Update allow-lists or support tickets when an address change is relevant.

Common question

Does a changed IP mean someone hacked me? No. For ordinary consumer service, it is usually routine provider behavior.