Used isimsoftware TCP Port Listener Tool for Windows?
Developer’s Description
By isimSoftware
Most online port testers fail no matter what if nothing accepts their connection attempt. This port tester program will open the port on the system it is running on and listen for a connection from this site. So when the port tester program says the ports are open you can count that they are.The port tester program is for testing connections to the machine the program is running on since it opens the port on that system and listens for a connection.
Used isimsoftware TCP Port Listener Tool for Windows?
Explore More

IP List Generator
Free
SNTP Service (64-bit)
Trial version
Why Can't I Connect?
Free
SNTP Service
Trial versionNetTMon
Free
SUDT SerialTrace
Trial version
Local Network Monitor
Trial version
Anytunnel
Trial versionSwitch Network
Trial version
AD-Browser
Trial version
Overseer Network Monitor
Trial version
MyConnection Server
Trial version