My website goes offline every now and then

The site name strong-frangollo-843f3c.netlify.app is accessible.
It is set to route to https://www.avatrics.com. Now, it seems to work most of time but every now and then like right now 4:11 pm NZT avatrics.com is not accessible.
comes with This site can’t be reached.
My DNS is being managed by netlify.

and now its working again at 4:47 pm NZT. This is really annoying now.
What should I do?

This type of issue is almost always caused by the internet service provider (ISP) blocking access to Netlify . If your ISP is blocking Netlify sites, Netlify cannot fix this.

The only way to resolve it is to contact the technical support for your ISP to get the block removed.