I thought for sure there was a thread about it but I'm ### if I can find it.
We know about Microsoft's LACNIC IP
but since when has the bona fide bingbot been using it?
Today's log-wrangling--going back to the 29th--reveals a clutch of bingbot visits ... including requests for URLs (both pages and images) that they know darn well have been redirected for more than 2 years. No requests for robots.txt from this IP, but otherwise unquestionably the real thing:
Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)