steemitdotcom site cannot be opened

Greetings to all the steemit, I am a newcomer to this platform and a few days ago I opened Steemit for the first time after my account was successfully registered.

but the next day I reopened my steemit account but I can't open it with an error message "please check your internet connection". I think this is normal because the server is under repair or is down. But today I tried to re-enter steemit site and it turns out I still can't open it with the same error message.

finally I tried to enter by using vpn because I was thinking in the country where I live cellular networks are so tightly blocking sites that are considered not permitted and it turns out that after I activate VPN I can open the steemit site again.

with this incident, I concluded that the cellular network that I was using had blocked the site steemit.com, I also did not understand why the cellular network that I used blocked sites like this and I did not know what other cellular service providers might be. can share with the experience.