Specify the port you want nmap to scan with -p option.
By default nmap scans only TCP ports.
sudo nmap -p 80 sharewiz.net
result:
Starting Nmap 6.40 ( http://nmap.org ) at 2016-07-08 00:53 BST Nmap scan report for sharewiz.net (5.42.134.35) Host is up (0.0016s latency). rDNS record for 5.42.134.35: bbdp5.42.134.35.network.sure.com PORT STATE SERVICE 80/tcp open http Nmap done: 1 IP address (1 host up) scanned in 1.31 seconds