Nmap scan report for www.facebook.com (57.144.248.1)
Host is up (0.068s latency).
Other addresses for www.facebook.com (not scanned): 2a03:2880:f10a:83:face:b00c:0:25de
rDNS record for 57.144.248.1: edge-star-mini-shv-01-fra3.facebook.com
Not shown: 98 filtered tcp ports (no-response)
PORT    STATE SERVICE
80/tcp  open  http
443/tcp open  https

Nmap done: 1 IP address (1 host up) scanned in 3.12 seconds