Is it possible to determine the transit provider at fault based on Cloudflare's list of affected areas?
1. Each Cloudflare POP has multiple bandwidth providers. 2. Each Cloudflare POP can and does change it's preferred BGP routes. 3. Telia's outage wasn't 100% of their network, so there are plenty of Telia links -- including ones to Cloudflare POPs -- that were not impacted.