title: List of IP Space used by Facebook
body: <p>I am looking for an authoritative list of IP space Facebook uses. I need this to support a locked down developer environment that has very tight restrictions on outbound connectivity.</p>
  
  <p>Today I found api and graph.facebook.com started resolving to 69.171.224.0/19 which was not previously in my filters. I've updated it but I'd like to know what other IP space I'm missing allow rules for.</p>
  
  <p>Here's what I have currently. Any additional IP blocks you can list out would be great. Thanks everyone.</p>
  
  <pre><code>69.63.176.0/20
  69.171.224.0/19
  66.220.144.0/20
  204.15.20.0/22
  </code></pre>