This site can’t be reached atlassian.com and atlassian.net

[Vlad]

I get "This site can’t be reached' if I try to visit:

https://www.atlassian.com/

https://atlassian.net/

https://bitbucket.net/

There is no PC which can reach the sites from my IP 

https://www.iplocation.net/
IPv4 Address 178.165.64.123

IP Location Kharkiv, Kharkivska oblast (UA) [Details]

Is there a black IP list and can I add it to the whitelist? 

[Diego]

From our team dedicated IP we met the same issue with atlassian.net domain and subdomains, we saw the problem today for the first time.

[jing.du]

I met the same issue. and dont know what to do

[Vlad]

I have contacted Slack with the same issue, and their support team solved the issue 
And the solution works for Atlassian.
Probably it is same trust list for all and my IP has been added in white list via Slack support,