I typed in the same ip range in my windows command prompt that Dan Lowrie typed in his nmap Basic course part 2 video andunlike in his video, its not showing any of the ports that are open on that ip address that he scanned:

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Unsolved Nmap tool not showing me any listed open ports when I scanned an IP address
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Hey Penny,
Sorry that you're having a bit of trouble with your nmap scan. Let's see if we can't figure out the problem.Let's start by verifying your IP information.
From your Command Prompt type ipconfig and press <enter>
Look for...IPv4 Address. . . . . . . . . . . . : <your IP address here>
If your IP address isn't 192.168.219.something then this could be why your scan isn't working. But not to worry.
Once you have your IP address information, try running...C:\>nmap -sT <your IP address here>
This should return some results. Then you should also be able to scan live hosts on your network giving nmap a range of hosts (like 192.168.0.30-50), or just scan the whole network using CIDR notation (like 192.168.0.0/24).
I hope this helps you and let me know if it does. If it doesn't, let me know that too and we'll continue troubleshooting.
Daniel
ITProTV
Show Host