render-domains

To configure a custom domain on Render, add the domain in your service Settings under Custom Domains, then update your DNS provider with the generated CNAME, A, or ALIAS records to verify ownership and provision TLS.

Render apex domains require an A record or ALIAS record pointing to the provided IP address, while www subdomains use a CNAME record pointing to your service's onrender.com address.

Render TLS certificate issuance fails when DNS records are misconfigured or have not fully propagated, so verify your CNAME or A records match the values in the service Settings before requesting certificate provisioning.

Yes, you can disable the default onrender.com subdomain after adding a custom domain by toggling off the original subdomain in the Custom Domains section of your web service or static site settings.

You can define custom domains in a render.yaml blueprint by adding the domain configuration block to your service definition, allowing automated provisioning of DNS settings and TLS certificates during deployment.

Render supports wildcard domains and their associated TLS certificates, allowing you to route multiple subdomains to a single web service by configuring the appropriate DNS records.