I can configure a custom domain for either frontend or backend, but not both

Hi @nickguner,

Thanks for reaching out and welcome to Netlify’s Support Forums!

Reviewing the site, I’m showing you have Netlify DNS setup and you’re using Netlify’s name servers at your registrar:

host -t ns hoofs-n-horns.com
hoofs-n-horns.com name server dns3.p01.nsone.net.
hoofs-n-horns.com name server dns2.p01.nsone.net.
hoofs-n-horns.com name server dns4.p01.nsone.net.
hoofs-n-horns.com name server dns1.p01.nsone.net.

If you instead want to configure External DNS, you can follow option 1 of our Support Guide:

You would configure an A Record for hoofs-n-horns.com that points to 75.2.60.5.

For www.hoofs-and-horns.com you would configure a CNAME Record that points to bejewelled-naiad-656cfc.netlify.app which you mentioned in your post.

You should only configure either External DNS or Netlify DNS. If you’re using External DNS, you will want to remove Netlify DNS and use the registrar name servers instead of Netlify’s name servers.

Let us know if you have any questions.