Specify an IP range to scan a range.
nmap 192.168.1.100-200
result:
Starting Nmap 6.40 ( http://nmap.org ) at 2016-07-07 23:55 BST Nmap scan report for 192.168.1.100 Host is up (0.056s latency). Not shown: 989 closed ports PORT STATE SERVICE 80/tcp open http 139/tcp open netbios-ssn 443/tcp open https 445/tcp open microsoft-ds 515/tcp open printer 631/tcp open ipp 6839/tcp open unknown 7435/tcp open unknown 8080/tcp open http-proxy 9100/tcp open jetdirect 9220/tcp open unknown Nmap scan report for android-d8443dafc4d5d365 (192.168.1.141) Host is up (0.024s latency). All 1000 scanned ports on android-d8443dafc4d5d365 (192.168.1.141) are closed Nmap scan report for android-166a0df867e23819 (192.168.1.157) Host is up (0.096s latency). All 1000 scanned ports on android-166a0df867e23819 (192.168.1.157) are closed Nmap scan report for RP-AC52 (192.168.1.169) Host is up (0.031s latency). Not shown: 998 closed ports PORT STATE SERVICE 53/tcp open domain 80/tcp open http Nmap done: 101 IP addresses (4 hosts up) scanned in 13.59 seconds