Resolve hosting DNS error.

[MehulKChaudhari]

Common cause of this error.

Cloudflare cannot resolve the origin web server’s IP address.

1. A missing DNS A record that mentions origin IP address.
2. A CNAME record in the Cloudflare DNS points to an unresolvable external domain.
3. The origin host names (CNAMEs) in your Cloudflare Load Balancer default, region, and fallback pools are unresolvable. Use a fallback pool configured with an origin IP as a backup in case all other pools are unavailable.
4. When creating a Spectrum app with a CNAME origin, you need first to create a CNAME on the Cloudflare DNS side that points to the origin. Please see Spectrum CNAME origins for more details

How to resolve

To resolve error 1016:

1. Verify your Cloudflare DNS settings include an A record that points to a valid IP address that resolves via a DNS lookup tool.
2. For a CNAME record pointing to a different domain, ensure that the target domain resolves via a DNS lookup tool.

Referred from cloudflare doc here

[iamsonukushwaha]