Custom domain error keeps coming

Technical Q&A

Topic summary

A user is experiencing recurring custom domain errors on Shopify, despite domain settings appearing correct (all green) when checked. The issue has occurred three times since morning.

Likely causes identified:

  • DNS propagation delays (can take up to 48 hours to fully settle)
  • ISP caching old DNS records
  • Duplicate A or CNAME records at the domain registrar
  • SSL certificate stuck in “pending” status

Recommended troubleshooting steps:

  1. Verify DNS records externally using dnschecker.org
  2. Confirm correct DNS configuration:
  3. Check SSL status in Settings > Domains; try removing and re-adding domain if stuck
  4. Test in incognito mode, different browsers/devices, or using mobile data/VPN
  5. Remove any duplicate or conflicting DNS records at the registrar

Status: Issue remains unresolved. One responder requested the store URL for further investigation. If troubleshooting fails, contacting Shopify support directly is recommended.

Summarized with AI on October 25. AI used: claude-sonnet-4-5-20250929.
1

Since this morning I got custom domain error thrice. Each time when I went to check the Domain setting and click to check it shows all green and ok.

Would be really helpful if someone could guide/help me to resolve this issue.

3

Hello @KARMAS ,

I hope you are doing well!

Can you please provide me with the store URL, so that I can check it? Also, can you please share the SS of Shopify where you add the domain?

4

Hi @KARMAS,

Here are a few things that might help:

  1. DNS might still be propagating:

    Even if it shows connected, sometimes changes can take up to 48h to fully settle across the internet. That can cause random errors.

  2. Check your DNS externally:

    Go to dnschecker.org and plug in your domain. Make sure your records look like this:

  3. SSL stuck on pending?

    Go to Settings > Domains and see if SSL is still “pending.” If it’s been like that for a while, try removing and re-adding the domain.

  4. Could be local cache or ISP DNS:

    Try checking:

    • In incognito/private mode

    • On a different browser/device

    • Using mobile data or a VPN (just to test)

    If this doesn’t work, try to reach out directly to the Shopify support, it might worth asking them to also their on their end.

5

Hi @KARMAS ,
On Shopify, “custom domain error” notifications usually happen when Shopify temporarily can’t verify your DNS - even if the domain settings later show all green.

Common causes:

  • DNS propagation delays (ISP caching old records).
  • Intermittent issues with your domain registrar’s DNS servers.
  • Having duplicate A or CNAME records in DNS.
  • If you recently updated DNS, it can flicker for 24–48h.

What you can do:

  1. In your domain registrar, make sure you have:
  • A record → 23.227.38.65 (Shopify IP)
  • CNAME for www → shops.myshopify.com
  • No conflicting old records.
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