---
title: "Can I map a root domain such as zylker.com, without www, to my Catalyst Slate app?"
url: https://docs.catalyst.zoho.com/en/faq/slate/map-root-domain/
description: "No. Catalyst Slate custom domains work with subdomains, such as www.zylker.com or app.zylker.com, not with a root domain. The mapping uses CNAME records, and …"
last_updated: 2026-11-13T05:00:22Z
service: Slate
type: faq
---

No. Catalyst Slate custom domains work with subdomains, such as `www.zylker.com` or `app.zylker.com`, not with a root domain. The mapping uses CNAME records, and many DNS providers do not allow a CNAME record on a root domain. Map a subdomain, then redirect the root domain to it at your DNS provider.

1. In your Slate app, open the deployment's **Deployment Overview** and click **Add Domain** in the **Domain Mapping** section.

2. Enter a subdomain such as `www.zylker.com` and click **Next**.

3. Add the Step 1 and Step 2 values as CNAME records at your DNS provider, clicking **Verify** after each.

4. Click **Request** to request the Group SSL certificate.

5. At your DNS provider, set up domain forwarding from `zylker.com` to `www.zylker.com` over HTTPS.

Note: The Catalyst certificate covers only the subdomain you mapped, so opening the root domain over HTTPS shows a certificate error unless your DNS provider serves the redirect over HTTPS.

Refer to the [Custom Domains help page](https://docs.catalyst.zoho.com/en/slate/help/custom-domains/) for more information.