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- Search Engines
-- Search Engine Spider and User Agent Identification
---- Facebook's Bots

keyplyr - 2:10 am on Jan 9, 2012 (gmt 0)


From my experience, the FB image grabber comes without UA/referrer from these 3 FB ranges:

66.220.144.0 - 66.220.159.255
66.220.144.0/20

69.63.176.0 - 69.63.191.255
69.63.176.0/20

69.171.224.0 - 69.171.255.255
69.171.224.0/19

But other FB utilities also use these (and other) FB ranges.

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