Here’s a quick method to identify hosts on a subnet. Â Also quickly gives some other useful info such as MAC Address and the Company Code for that MAC address. Â Whether host is up or down and the latency.
$ sudo nmap -sP 192.168.100.0/24
example
Nmap scan report for 192.168.1.128
Host is up (0.021s latency).
MAC Address: 00:80:77:95:32:19 (Brother Industries)
Nmap scan report for 192.168.1.129
Host is up (0.0052s latency).
MAC Address: 00:0D:4B:D2:BF:30 (Roku)
Nmap scan report for 192.168.1.130
Host is up (0.023s latency).
MAC Address: 00:0D:4B:9A:AA:81 (Roku)