GitLab is blocking connection from my home network

Hi I am experiencing strange problem with my access to gitlab.
When i am using my home network i cant enter my company gitlab page ( 444) Everything was working fine until yesterday
When i swithed to my mobile internet (and create hotspot) i was able to connect but after a while i was again timed out from the page.
Can someone could tell me what could be wrong here? It seems like my traffic is blocked by gitlab