FreePing is a software test tool for maintaining and debugging network problems on a local area network (LAN).
Get an easy view for a full subnet on a single screen. Look at the screen to the left displaying the status for devices 192.168.2.0 - 192.168.2.255.
Green and the device is working, yellow, there is a problem, and red, the device is not any longer on the LAN.
FEATURES
* Ping a single IP address
* Traceroute, to determine the route taken by packets across an IP network
* Display the iPhone IP address