List of IP Space used by Facebook [closed]

Answer 1

Updated list as of 6/11/2013

204.15.20.0/22
69.63.176.0/20

66.220.144.0/20
66.220.144.0/21
69.63.184.0/21
69.63.176.0/21
74.119.76.0/22
69.171.255.0/24
173.252.64.0/18
69.171.224.0/19
69.171.224.0/20
103.4.96.0/22
69.63.176.0/24
173.252.64.0/19
173.252.70.0/24
31.13.64.0/18
31.13.24.0/21
66.220.152.0/21
66.220.159.0/24
69.171.239.0/24
69.171.240.0/20
31.13.64.0/19
31.13.64.0/24
31.13.65.0/24
31.13.67.0/24
31.13.68.0/24
31.13.69.0/24
31.13.70.0/24
31.13.71.0/24
31.13.72.0/24
31.13.73.0/24
31.13.74.0/24
31.13.75.0/24
31.13.76.0/24
31.13.77.0/24
31.13.96.0/19
31.13.66.0/24
173.252.96.0/19
69.63.178.0/24
31.13.78.0/24
31.13.79.0/24
31.13.80.0/24
31.13.82.0/24
31.13.83.0/24
31.13.84.0/24
31.13.85.0/24
31.13.87.0/24
31.13.88.0/24
31.13.89.0/24
31.13.90.0/24
31.13.91.0/24
31.13.92.0/24
31.13.93.0/24
31.13.94.0/24
31.13.95.0/24
69.171.253.0/24
69.63.186.0/24
204.15.20.0/22
69.63.176.0/20
69.63.176.0/21
69.63.184.0/21
66.220.144.0/20
69.63.176.0/20

Answer 2

The list from 2020-05-23 is:

31.13.24.0/21
31.13.64.0/18
45.64.40.0/22
66.220.144.0/20
69.63.176.0/20
69.171.224.0/19
74.119.76.0/22
102.132.96.0/20
103.4.96.0/22
129.134.0.0/16
147.75.208.0/20
157.240.0.0/16
173.252.64.0/18
179.60.192.0/22
185.60.216.0/22
185.89.216.0/22
199.201.64.0/22
204.15.20.0/22

The method to fetch this list is already documented on Facebook's Developer site, you can make a whois call to see all IPs assigned to Facebook:

whois -h whois.radb.net -- '-i origin AS32934' | grep ^route

Answer 3

# Bloqueio facebook
for ip in `whois -h whois.radb.net '!gAS32934' | grep /`
do
  iptables -A FORWARD -p all -d $ip -j REJECT
done