This tool can help you to scan out LAN IP that you can use.
Install and update with go get -u github.com/cloverstd/can-use-host
Usage of ./main:
-end string
end ip (default "127.0.0.1")
-start string
start ip (default "127.0.0.1")
This tool use go-fastping, You may need to run it as root user.