My subdomain is not working and showing warning *CHECK DNS Configuration*

My primary domain is working but subdomain is not working i.e my website is working without www. but not working with www.
I changed DNS name server within domain. I have pointed www CNAME record to But still My subdomain shows a warning informing me to check DNS configuration . Is there is anything I have forgotten to do that would cause this issue?

Hi @engageNreap

I’m a little confused as to what you are doing. Going by dig I see the nameservers for are i.e.

% dig NS +noall +answer

; <<>> DiG 9.10.6 <<>> NS +noall +answer
;; global options: +cmd	3442	IN	NS	3442	IN	NS

with the appropriate A record pointing to the Netlify load balancer as specified in Configure external DNS for a custom domain

% dig A +noall +answer

; <<>> DiG 9.10.6 <<>> A +noall +answer
;; global options: +cmd	304	IN	A

though I see no corresponding CNAME record for the www subdomain

% dig CNAME +noall +answer

; <<>> DiG 9.10.6 <<>> CNAME +noall +answer
;; global options: +cmd

However the screenshot provided shows is in Netlify DNS and in order to use this the domain needs delegating to Netlify which requires changing the nameservers.

If you currently have configured in Netlify DNS (see then you either need to configure the nameservers appropriately to use it, or remove the domain (not the custom domain from the site though) and the CNAME pointing to the Netlify address of the site you are connecting the domain to and wait for propagation to take place.

There is a great Support Guide with links to many others relating to configuring and troubleshooting DNS/SSL on Netlify.

If you have further questions, do not hesitate to reply here.

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