This is one python script which you can use to ping all IP addresses inside one subnet.

Running environment is Python3.

Usage:

Run the script under Python3:

$python3 pingsubnet.py

Please enter the network address: 10.0.9.0 <-=== You can enter the LAN network address here

Please enter the subnet mask length: 25 <-=== Then please enter the subnet mask length here

PING 10.0.9.1 (10.0.9.1) 56(84) bytes of data. ,_=== Now the script will start pinging all the IPs inside this LAN subnet.