Just checked My chrome conenction, there someone are expected, someone are not. I saw 3 weird connection to Visicom-8x.nationalnet.com
then I ping the get the ip of those DNS, it’s 66.115.130.139, or 138 
when you try access this page directly, you will see error. 
weird, then I captured the Network traffic , oh got, saw the http traffic,
Follow it, it’s a http HEAD request
What the hell is the sherqsjgod host here?
after disable the extensions one by one ,it’s caused by the Web developer tools, 
stupid plug-in! here is the official link,
https://chrome.google.com/webstore/detail/bfbameneiokkgbdmiekhjnmfkcnldhhm
Just disable it, the weird traffic will be gone.
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