Device keeps changing IP address

Problem summary

Changing local IP addresses are usually a DHCP reservation issue, not a sign the device is hacked or broken.

When to worry

• Apps or shortcuts stop finding the device after router restarts.
• A printer, camera, or storage device appears at a different address every few days.
• You have manually set addresses on several devices.

Fast checks

• Find the device in the router's client list by name or MAC address.
• Check whether the device has a manual static IP set on the device itself.
• Restart the device and confirm whether the router gives it a new lease.
• Look for duplicate device names or old offline entries.

Likely causes

• The router is assigning addresses dynamically without a reservation.
• A manual static IP conflicts with the router's DHCP range.
• The device changes MAC address privacy settings on Wi-Fi.
• A router replacement changed the home subnet.

Step-by-step fix

1. 1Use the router app to create a DHCP reservation for the device.
2. 2Keep the reserved address inside the router's managed range unless the manual says otherwise.
3. 3Turn off private/random MAC for that trusted home network only if the device must be reserved.
4. 4Update app shortcuts, printer ports, or bookmarks to the reserved address.
5. 5Label the reservation with the device name so it is recoverable later.

What not to do

• Do not assign the same address in both the router and the device unless the vendor requires it.
• Do not disable DHCP for the whole network.
• Do not expose local devices to the internet just to make them easier to find.

When to stop/get help

• Stop if two devices claim the same IP; disconnect one and clean up reservations.
• Stop if you do not control the router account.
• Get help before changing subnet, DHCP range, or VLAN settings.

Related tool/checklist

Use the linked tool when you need a guided plan from your exact symptoms instead of a static checklist.

Related problems

Last reviewed

2026-05-06

Sources/assumptions

• Assumes private home IPv4 addressing managed by a consumer router.
• Does not cover business VLAN, static routing, or public IP assignment.