~$  nmap -sP 192.168.0.1/24

Starting Nmap 5.21 ( http://nmap.org ) at 2012-12-20 18:07 CET
Nmap scan report for silverserverdsl.silveradsl (192.168.0.1)
Host is up (0.0024s latency).
Nmap scan report for 192.168.0.129
Host is up (0.0040s latency).
Nmap scan report for new-host-2.silveradsl (192.168.0.130)
Host is up (0.00059s latency).
Nmap scan report for Ignaz-lubuntu.silveradsl (192.168.0.131)
Host is up (0.00050s latency).
Nmap scan report for Android_358968042726634.silveradsl (192.168.0.132)
Host is up (0.089s latency).
Nmap scan report for Julia-PC.silveradsl (192.168.0.133)
Host is up (0.0012s latency).
Nmap done: 256 IP addresses (6 hosts up) scanned in 3.45 seconds