Getting ERR_NAME_NOT_RESOLVED only from MY PC and only from WIFI

ReRed asked:

I am setting up the website and it literally works fine from all my devices using mobile data, but not from WiFi (any WiFi, not just a specific one). However, from anyone I ask to test it, it works for them. I literally wrote the web app and set up the server and am the only one who is unable to access it (unless using mobile data). Can it be related to some DNS settings? Because other people in the same WiFi can access it. However, the issue is on my Mac, iPad, and iPhone. Thank you.

My answer:

Your DNS settings are wrong. is an alias for has address has address has IPv6 address 2a01:4f8:c2c:ccb7:: mail is handled by 20 mail is handled by 10 mail is handled by 50

You’ve entered an IP address belonging to Namecheap hosting, and two others belonging to Hetzner. It will be essentially random whether any particular user gets the correct address record first in the list and thus can access your site. I could not.

You should remove the incorrect DNS address record(s) depending on where you are actually hosting your site.

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