I had trouble accessing some internet site, including zendesk.com, but then in Facebook, spotted this news by gizmodo:
http://gizmodo.com/this-is-probably-why-half-the-internet-shut-down-today-1788062835
This Is Probably Why Half the Internet Shut Down Today [Update: It’s Happening Again]
According to that article, these sites are trouble:
- ActBlue
- Basecamp
- Big cartel
- Box
- Business Insider
- CNN
- Cleveland.com
- Esty
- Github
- Grubhub
- Guardian.co.uk
- HBO Now
- Iheart.com (iHeartRadio)
- Imgur
- Intercom
- Intercom.com
- Okta
- PayPal
- People.com
- Playstation Network
- Recode
- Spotify
- Squarespace Customer Sites
- Starbucks rewards/gift cards
- Storify.com
- The Verge
- Twillo
- Urbandictionary.com (lol)
- Weebly
- Wired.com
- Wix Customer Sites
- Yammer
- Yelp
- Zendesk.com
- Zoho CRM
- Credit Karma
- Eventbrite
- Netflix
- NHL.com
- Fox News
- Disqus
- Shopify
- Soundcloud
- Atom.io
- Ancersty.com
- ConstantContact
- Indeed.com
- New York Times
- Weather.com
- Mashable
- WSJ.com
- time.com
- xbox.com
- dailynews.com
- Wikia
- donorschoose.org
- Wufoo.com
- Genonebiology.com
- BBC
- Elder Scrolls Online
- Eve Online
- PagerDuty
- Kayak
- youneedabudget.com
- Speed Test
- Freshbooks
- Braintree
- Blue Host
- Qualtrics
- SBNation
- Salsify.com
- Zillow.com
- nimbleschedule.com
- Vox.com
- Livestream.com
- IndieGoGo
- Fortune
- CNBC.com
- FT.com
- Survey Monkey
- Paragon Game
- Runescape
Hope this information useful to anyone here.