What is a 1016 Error?

A 1016 Origin DNS error is a Cloudflare-specific error code for: "Cloudflare's edge network cannot resolve the upstream IP address of the website's origin server.".

How do I fix or troubleshoot a 1016 Error?

Common steps include reloading the page in your browser, checking for typos in the URL, verifying server status, clearing browser cache or cookies, and contacting the website owner or server administrator if the error persists.

1016 Error | Error-Message.Net

Common cause

Cloudflare received a request for a proxied domain, but Cloudflare’s internal resolvers were unable to look up the IP address of the origin web server.

This typically happens when:

An A or CNAME record points to a target host that does not exist or has expired DNS records.
The authoritative DNS servers for your origin server are unreachable or returning DNS SERVFAIL.

Resolution:

If you are not the website owner:

The website’s DNS routing is broken. You must wait for the site administrator to fix their origin DNS records.

If you are the website owner:

Log into Cloudflare > DNS.
Inspect the DNS record for the affected hostname. If it is a CNAME record, verify that the target domain resolves properly in public DNS using a tool like dig or nslookup.
Replace broken CNAME records with a direct A record pointing to your origin web server’s static IP address.

Source: Cloudflare Documentation - Troubleshooting Cloudflare 1XXX errors (Error 1016)