Networking: Finding the master server in LAN

Hi,

I am trying to build an app that connects a few devices through the LAN network. The idea is to create a master server on PC app, and the connects to this server from mobile devices like a tablet or phone.
I tried to use NetworkManager HUD, and in general, everything is working as desired, however, I am trying to figure out how can I find the IP address of the master server (it gets the local IP of the PC, like 192.168.0.51).
Is there any way that I can find that server address from client device?

Sorry for a basic question, I am kinda new in networking.
Thanks a lot,
Adrian

 

I haven't used it

https://docs.unity3d.com/Manual/UNetDiscovery.html