Ads free Pro version.
Pro version has additional port scanner and telnet client.

Small and simple toolbox for getting useful network information. NetToolBox has internal tools for checking internet connectivity and quality. can get internal and external IP address, device network interfaces and their capabilities. can see Wi-Fi neighbor networks list and analyze Wi-Fi channels distribution and load to use best frequency and avoid wireless network connection problems. Traceroure and ping available to check your connectivity latency. Whois database querying to get ip/domain information. Internet speed can be measured. For speed test, closest test server is used to get most precise result.