If it is on the same subnet as your usual devices, I'd suggest that it is your WiFi which is the problem.
The easiest way to check is to use a WiFi scanner and see if it reports any unsecured networks in your vicinity.
If it is on the same subnet as your usual devices, I'd suggest that it is your WiFi which is the problem.
The easiest way to check is to use a WiFi scanner and see if it reports any unsecured networks in your vicinity.