Recently I was watching a azure tutorial video on YouTube from Microsoft Azure channel. There I learnt there is a website which shows LIVE list of network issues happening around the world with respect to internet.
You can go to live.cedexis.com to get a view of internet network issues. Basically this site lists out issues based on severity over ISP, CDN and CLOUD types. I found it very interesting.
Cloud providers use cedexis.com services to route their network traffic among different data centers to mitigate internet network issues.