"Let's Encrypt" SSL certificate has default domain name instead of custom domain [Deploy previews]

Hi @RomSF,

That marker indicates that their is a Netlify DNS Zone, however, it doesn’t necessarily mean DNS is configured correctly. For the apex domain the DNS Zone is inactive:

dig streamflow.finance NS +trace | tail -n 6
;; Received 612 bytes from 65.22.21.10#53(v0n1.nic.finance) in 109 ms

streamflow.finance.	86400	IN	NS	harvey.ns.cloudflare.com.
streamflow.finance.	86400	IN	NS	may.ns.cloudflare.com.
;; Received 103 bytes from 2803:f800:50::6ca2:c398#53(harvey.ns.cloudflare.com) in 43 ms

With the cloudflare.com name servers configured instead of the Netlify name servers mentioned here: Netlify App

For preview-beta.streamflow.finance I’m seeing mixed results, however, the received is coming from cloudflare:

dig preview-beta.streamflow.finance NS +trace | tail -n 6
preview-beta.streamflow.finance. 300 IN	NS	dns4.p08.nsone.net.
;; Received 149 bytes from 172.64.32.135#53(may.ns.cloudflare.com) in 31 ms

This Support Guide explains what an inactive DNS Zone is and how to fix it: