Performing a basic port scan (nmap -F www.tandfonline.com)
Nmap scan report for www.tandfonline.com (104.18.39.123)
Host is up (0.00082s latency).
Other addresses for www.tandfonline.com (not scanned): 2606:4700:4400::6812:277b 2606:4700:4400::ac40:9485 172.64.148.133
Not shown: 96 filtered tcp ports (no-response)
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 2.27 seconds