---
description: Use custom domains with Cloudflare Realtime TURN via CNAME DNS records.
title: Custom TURN domains
image: https://developers.cloudflare.com/og-docs.png
---

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# Custom TURN domains

Last updated Aug 24, 2026|Copy as Markdown|[View as Markdown](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/realtime/turn/custom-domains/index.md)|[Agent setup](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/agent-setup/)

Cloudflare Realtime TURN service supports using custom domains for UDP, and TCP - but not TLS protocols. Custom domains do not affect any of the performance of Cloudflare Realtime TURN and is set up via a simple CNAME DNS record on your domain.

| Protocol      | Custom domains | Primary port | Alternate port |
| ------------- | -------------- | ------------ | -------------- |
| STUN over UDP | ✅              | 3478/udp     | 53/udp         |
| TURN over UDP | ✅              | 3478/udp     | 53 udp         |
| TURN over TCP | ✅              | 3478/tcp     | 80/tcp         |
| TURN over TLS | No             | 5349/tcp     | 443/tcp        |

## Setting up a CNAME record

To use custom domains for TURN, you must create a CNAME DNS record pointing to `turn.cloudflare.com`.

Caution

Do not resolve the address of `turn.cloudflare.com` or `stun.cloudflare.com` or use an IP address as the value you input to your DNS record. Only CNAME records are supported.

Any DNS provider, including Cloudflare DNS can be used to set up a CNAME for custom domains.

Note

If Cloudflare's authoritative DNS service is used, the record must be set to [DNS-only or "grey cloud" mode](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/dns/proxy-status/#dns-only-records).\`

There is no additional charge to using a custom hostname with Cloudflare Realtime TURN.

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