---
title: Check domain DNS · Cloudflare Learning Paths
description: Once you add and activate your domain at Cloudflare, check that all your DNS records are set up correctly.
lastUpdated: 2025-04-15T08:28:05.000Z
source_url:
  html: https://a74404c8.preview.developers.cloudflare.com/learning-paths/get-started-free/onboarding/check-dns/index.md
  md: https://a74404c8.preview.developers.cloudflare.com/learning-paths/get-started-free/onboarding/check-dns/
---

Once you [add and activate](https://developers.cloudflare.com/learning-paths/get-started-free/onboarding/add-and-activate/) your domain at Cloudflare, check that all your DNS records are set up correctly.

## Can you visit your website?

If your website already existed before adding it to Cloudflare, the easiest way to test DNS resolution is to try and visit your domain (`example.com`) or a subdomain (`www.example.com`).

As long as you [reviewed](https://developers.cloudflare.com/dns/zone-setups/full-setup/setup/#review-dns-records) your DNS records when adding your domain, everything should work just fine.

### Potential issues

Sometimes, domains added to Cloudflare can experience issues in DNS resolution.

```mermaid
flowchart TD
accTitle: Potential DNS resolution issues
A[Request to <code>example.com</code>] --> B[<code>DNS_PROBE_FINISHED_NXDOMAIN</code>]
B --> C[DNS records missing or incorrect]
A --> D[Error <code>520</code>, <code>521</code>, or <code>522</code>]
D --> E[Origin server offline or blocking Cloudflare IPs]
A --> F[Error <code>523</code>, <code>1000</code>, <code>1001</code>, <code>1002</code>, <code>1014</code>, <code>1016</code>, or <code>1034</code>]
F --> C
```



For more details on these errors and how to fix them, refer to the following resources:

* [`DNS_PROBE_FINISHED_NXDOMAIN`](https://developers.cloudflare.com/dns/troubleshooting/dns-probe-finished-nxdomain/)
* [Cloudflare 5xx errors](https://developers.cloudflare.com/support/troubleshooting/http-status-codes/cloudflare-5xx-errors/)
* [Cloudflare 1xxx errors](https://developers.cloudflare.com/support/troubleshooting/http-status-codes/cloudflare-1xxx-errors/)
* [Add a record on the zone apex](https://developers.cloudflare.com/dns/manage-dns-records/how-to/create-zone-apex/)
* [Add a subdomain](https://developers.cloudflare.com/dns/manage-dns-records/how-to/create-subdomain/)
* [Allow Cloudflare IP addresses](https://developers.cloudflare.com/fundamentals/concepts/cloudflare-ip-addresses/)

## Does your domain's email still work?

If your domain supported email beforehand, try sending a few emails to your domain's address.

If those emails cannot be delivered, the issue is usually with your domain's `MX` DNS records. For help, refer to the following resources:

* [Vendor-specific DNS records](https://developers.cloudflare.com/dns/manage-dns-records/reference/vendor-specific-records/)
* [Troubleshooting email issues](https://developers.cloudflare.com/dns/troubleshooting/email-issues/)
* [Add email records](https://developers.cloudflare.com/dns/manage-dns-records/how-to/email-records/)
