server IP address could not be found

Mike Hawke 20 Reputation points
2025-05-13T09:56:47.1+00:00

Getting "server IP address could not be found" when trying to connect to web app. No errors in Azure. Everything running OK. Not made any changes to configuration. I've spent several hours trying to create a support ticket which is very frustrating and seem to be directed here instead, which I've never used before.

Azure App Service
Azure App Service
Azure App Service is a service used to create and deploy scalable, mission-critical web apps.
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  1. Vlad Costa 1,565 Reputation points
    2025-05-13T11:29:22.95+00:00

    It sounds basic, but the most common cause of this error is a simple typo in the domain name. Make sure you are typing the URL exactly as it should be.

    If you are using a custom domain (like www.yourcompany.com), try accessing your web app directly using its default .azurewebsites.net address (e.g., https://yourwebappname.azurewebsites.net). If this works, the problem will be with your custom domain's DNS configuration.

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  1. Mike Hawke 20 Reputation points
    2025-05-13T18:50:40.06+00:00

    We haven't changed any settings or config that would explain why this worked last week (and subsequent years) but not now.

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  2. Mike Hawke 20 Reputation points
    2025-05-14T11:53:44.9933333+00:00

    Thanks very much for your help! I've checked the custom domain and there doesn't look like there is a DNS configuration setup. I'm not familiar with these settings so will try and figure out how to do it, but my question is where would my missing config have gone? As I said, the system has been fine for years and I've never had to look at this before. Should I just go ahead and google how to do this setup or should I try and get to the root cause first? Really appreciate your help and advice as this is not my area of expertise.

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  3. Mike Hawke 20 Reputation points
    2025-05-14T12:12:08.91+00:00

    Quick update. I checked the custom domain using whois and the domain registration has just expired. I guess sorting that out will get me back up and running. Geez I wish I could have had a notification of some sort - i guess the team who set this up (now sadly gone) would have got it.


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