Problem connecting to gitlab from specific IP address

I can not connect to gitlab from my server! Its IP address is 130.185.73.165.
I used to connect to it but from 2 days ago I can not connect to it. I did not ever change my server configuration.
I test these commands.
curl gitlab.com
ssh gitlab.com
telnet gitlab.com 22
telnet gitlab.com 80
and none of them worked.
my Ip of gitlab is: 52.167.219.168
can anybody help?