Investigate an IP address

On my router(Virgin Media) I found a device labelled as “unknown” I often see the router not assigning the device name but I do have a clue about which device is.

However this specific device got me curious because in the port forwarding section, a UDP port has been assigned to the IP address of this unknown device

My question is, what steps and methods can I implement to find as much information as possible from this device?

What I did so far is this On Mac, I run a port scanner, which found port 41800 open On the terminal I run

sudo nmap -sS -T4 -A -p- <IP> 

The above found port 9295 open The router has assigned UDP port 9308 to this IP address

If I do telnet on 41800,9295, it connects but I can’t do anything else I can’t do telnet on 9308 but I get success by running

nc -z -v -u <IP> 9308 

However, I’m not being able to do anything more than this, not a clue about what kind of device it could be or anything else

What else can I do?

Thank you