Re:DNS Performance compared: CloudFlare 1.1.1.1 x Google 8.8...
by reaperducer on Monday April 02, 2018 @11:22AM
(#16735273)
Sometimes it's not even at the ISP level. I experienced a similar adventure a few months ago. I turns out that my cellular hotspot caches PDFs. It's not even at the ISP level, it's in the little box in my pocket.
Naturally, it can't be disabled.