Performing a basic port scan (nmap -F adamd.substack.com)
Nmap scan report for adamd.substack.com (104.18.33.245)
Host is up (0.0011s latency).
Other addresses for adamd.substack.com (not scanned): 2606:4700:4400::6812:21f5 2606:4700:4400::ac40:9a0b 172.64.154.11
Not shown: 96 filtered ports
PORT STATE SERVICE
80/tcp open http
443/tcp open https
8080/tcp open http-proxy
8443/tcp open https-alt
Nmap done: 1 IP address (1 host up) scanned in 7.87 seconds