PortCheck is a free command line tool for Windows 10 / Windows 11. It checks if a remote machine answers on a specific TCP port.
Displays permanently whether devices answer on a particular TCP port
Shows response time in ms with colored output
Checks multiple devices simultaneously on predefined or self defined ports
Beep for reachable or unreachable ports
ERRORLEVEL for use in own batch files
Logging with date and time possible
Developed for Windows 7 / 8 / 10 / 11 and Windows Server 2008 / 2012 / 2016 / 2019
Free - for private and professional use
PortCheck [-t] [-i] <hostname(s)> <port(s)>
More complex syntax:
PortCheck [-t] [-i] [-w:<pause in s>] [-st] [-nc] [-oo] [-nl] [-tc]
[-rcf:<batch file when closed>] [-rcc:<closed count>] [-rco] [-rch]
[-rof:<batch file when open>] [-roc:<open count>] [-roo] [-roh]
[-replaceopentext:<text when open>] [-replaceclosedtext:<text when closed>]
<hostname(s)> <port(s)> [<timeout in ms>] [<name of logfile>] [<description>]
PortCheck www.msn.com 80
Checks once if www.msn.com answers on port 80 (HTTP).
PortCheck -t www.google.com 443
Checks continuously (as with the ping command) if www.google.com responds on port 443 (HTTPS).
PortCheck -t Server1,Server2 3389
Checks continuously if Server1 and Server2 respond on port 3389 (RDP).
For more examples please visit the tcp port check windows website.