Block Facebook’s IP address in addition to its domain name to restrict access to the social networking giant on your home network. Like many popular websites, Facebook uses a large number of Internet servers to process incoming requests to its service, so to block Facebook, you’ll be blocking the entire list of IP addresses that the company owns.
How to Know Which IP Address is Logged in to Facebook: Facebook Tips and Tricks
To block access to Facebook from your home network, restrict the following IP ranges:
Below are some of the most common active IP addresses for Facebook.com:
In some cases, you can access Facebook using an IP address instead of the usual URL. This shortcut is useful if you want to visit the social networking service, but you can't resolve domain names behind a particular network.
