List of Facebook CDN addresses

Question

I need to compile a list of the addresses of all the CDNs used by Facebook.

Example:

fbcdn-sphotos-a.akamaihd.net
fbstatic-a.akamaihd.net
...

I need these for a captive portal application that allows user to connect to WiFi with facebook. We allow facebook.com through the firewall for Graph API calls, but one of the issues we had is that the Facebook login dialog takes forever to load and loads without stylesheets/images. We fixed that by white-listing fbstatic-a.akamaihd.net, but we want to make sure we won't have surprises later.

Answer 1

fbstatic-a.akamaihd.net

fbcdn-profile-a.akamaihd.net 

fbcdn-sphotos-a-a.akamaihd.net

fbcdn-creative-a.akamaihd.net

fbexternal-a.akamaihd.net

And:

fbcdn-sphotos-b-a.akamaihd.net

fbcdn-sphotos-c-a.akamaihd.net

fbcdn-sphotos-d-a.akamaihd.net

fbcdn-sphotos-e-a.akamaihd.net

fbcdn-sphotos-f-a.akamaihd.net

fbcdn-sphotos-g-a.akamaihd.net

fbcdn-sphotos-h-a.akamaihd.net

Those start from character A and ends at H, if Facebook would add a new domain it must be like :

fbcdn-sphotos-i-a.akamaihd.net

So future CDN domains would be

fbcdn-sphotos-j-a.akamaihd.net

fbcdn-sphotos-k-a.akamaihd.net

fbcdn-sphotos-l-a.akamaihd.net

fbcdn-sphotos-m-a.akamaihd.net

fbcdn-sphotos-n-a.akamaihd.net

And So on.. till character Z

Answer 2

akamaihd is used for old photos and for special photos(cover ph. example..) only as I see...

They created new servers and there is some new logic in them as well. Example:

scontent-a-lhr.xx.fbcdn.net scontent-b-lhr.xx.fbcdn.net and more but I have seen some shared photos on interesting links. Example this:

https://fbcdn-sphotos-h-a.akamaihd.net/hphotos-ak-prn2/v/1472407_10151814939401656_1687041676_n.jpg?oh=d92bc9af7f987c5fe298ecc8c717a4e1&oe=5287894B&__gda__=1384659513_abeb3f33223e6e737aff91419149509e