If you are using AdGuard Home or any other DNS-filtering service, verify that the domain is not being filtered or rewritten.
Confirm the domain’s spelling and test its availability from another device or network (e.g., mobile data) to determine whether the issue is local or service-side.
Thank you so Will for your prompt reply. Yes, I have followed and tried google DNS or Cloudflare DNS as per your recommendation but the issue persists. here is nslookup results
Just to confirm, is mysite.ca the domain you are having trouble with?
If it is a different domain, please provide the exact address so we can look into it in more detail.
In addition, have you had a chance to verify the following, as previously suggested?
The domain name is spelled correctly
The service behind the domain is running normally
The domain can be accessed from other devices or networks (for example, using mobile data on your phone)