Setup

Note

If the CNAME target is on the same zone as the CNAME record, Cloudflare proceeds with CNAME flattening and ignores the CNAME Flattening setting.

For your zone apex

CNAME flattening occurs by default for all plans when your domain uses a CNAME record for its zone apex (example.com, meaning the record Name is set to @).

For all CNAME records

Accounts on paid plans can choose to flatten all CNAME records on their domain. This option is useful for DNS-only (unproxied) CNAME records since proxied records are flattened by default (as they return Cloudflare IPv4 and IPv6 addresses).

1. Log in to the Cloudflare dashboard ↗ and select your account and domain.
2. Go to DNS > Settings.
3. For CNAME Flattening, select Flatten all CNAMEs.

Warning

If a CNAME target is being used to verify a domain for a third-party service, enabling the Flatten all CNAMEs setting may cause that functionality to work incorrectly since the CNAME record itself will not be returned directly.

Per record

Accounts on paid plans also have the option to flatten specific CNAME records. This operation is currently only supported via API.

With the available API endpoints, specify the following for each CNAME record in the request body:

"settings": {
  "flatten_cname": true
}