Performing a basic port scan (nmap -F tsubaiso.jp)
Nmap scan report for tsubaiso.jp (18.244.214.73)
Host is up (0.012s latency).
Other addresses for tsubaiso.jp (not scanned): 18.244.214.17 18.244.214.22 18.244.214.34
rDNS record for 18.244.214.73: server-18-244-214-73.sfo53.r.cloudfront.net
Not shown: 98 filtered ports
PORT STATE SERVICE
80/tcp open http
443/tcp open https
Nmap done: 1 IP address (1 host up) scanned in 4.64 seconds