I create a Azure DNS zone to host the DNS records for a domain registered with IONOS, I updated successfully and more than 48 hours ago the name servers on the registrar but using different DNS checker tools the records still do not show up. I registered three DNS records: an A record pointing from autoboost.it to an IP address of a server that hosts a webpage, a CNAME record and TXT record to configure a custom domain for an Azure Container App as shown in the attached image. When running a nslookup on the domain i get *** Can't find autoboost.it: No answer and the online tool dnschecker.org reports no A or CNAME records; both tool report the SOA record correctly. I followed the instruction on this troubleshooting guide https://learn.microsoft.com/en-us/azure/dns/dns-troubleshoot but none were helpful.

@Riccardo Barbieri , Welcome to the Microsoft Q&A Platform. Thank you for reaching out & I hope you are doing well Per Marcin Policht 's comment, Are you sure you added the Name servers to your domain registrar? Is the A record created for "www" or some other name? Cheers, Kapil

Verify delegation by following https://learn.microsoft.com/en-us/azure/dns/dns-domain-delegation If the above response helps answer your question, remember to "Accept Answer" so that others in the community facing similar issues can easily find the solution. Your contribution is highly appreciated. hth Marcin

Azure DNS records do seem to work

Accepted answer

KapilAnanth-MSFT 38,051 Reputation points Microsoft Employee

2024-05-23T10:31:06.4166667+00:00
@Riccardo Barbieri ,

Welcome to the Microsoft Q&A Platform. Thank you for reaching out & I hope you are doing well

Per Marcin Policht's comment,

Are you sure you added the Name servers to your domain registrar?

Is the A record created for "www" or some other name?

Cheers,

Kapil
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Riccardo Barbieri 40 Reputation points

2024-05-23T11:32:08.84+00:00

@KapilAnanth-MSFT

Thank you for your reply.
Yes, I am sure that I correctly changed the nameservers as confirmed by the control panel of my registrar.

I also confirmed with their customer support that there are no problems on their part with the NS settings (the NSs are not shown in order here but they are correctly set in their respective positions as first, second and so on).

The A record is configured with the name "autoboost.it", I forgot to add the image in the original question.

KapilAnanth-MSFT 38,051 Reputation points Microsoft Employee

2024-05-23T11:57:22.9733333+00:00

@Riccardo Barbieri ,

Thanks for sharing the information.

I think I found the issue.

You have defined "helloworld.autoboost.it" record within the zone "autoboost.it"

Which means, the effective DNS becomes "helloworld.autoboost.it.autoboost.it"

Instead, you just have to define "helloworld"

See :

Same goes for the TXT and A name records.

As a side note, I see you are trying to add A record for the root of your domain,

In that case, you must use "@"

In case "@" record of type A already exists, you can edit it to resolve to your preferred IP Address.

More info : DNS records

Kindly let us know if this helps or you need further assistance on this issue.

Thanks,

Kapil

Please don’t forget to close the thread by clicking "Accept the answer" wherever the information provided helps you, as this can be beneficial to other community members.

Riccardo Barbieri 40 Reputation points

2024-05-23T12:08:17.1133333+00:00

Yes this is definitely the problem, thank you very much. I created the records as such because I always used cloudflare as a DNS provider and it works differently.

KapilAnanth-MSFT 38,051 Reputation points Microsoft Employee

2024-05-23T13:44:56.09+00:00

@Riccardo Barbieri ,

Glad we can be of assistance.

Thanks for your contribution on Q&A and appreciate much for taking the time to share your feedback.

Cheers,

Kapil
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Azure DNS records do seem to work

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