Custom domains help build trust and give your website a professional edge. If you're running into trouble connecting your domain, this guide will walk you through the steps to check your setup and understand what may be happening.
Propagation can take up to 48 hours
After updating your domain settings, it can take up to 48 hours for the changes to take full effect. This process is called propagation. It is not specific to Durable. It is how the internet distributes updates across thousands of internet service providers around the world. During this window, your domain may not load consistently or at all, depending on whether your internet provider has received the update.
👀 We’re already watching for issues
Our system automatically flags custom domain issues to our team. If a problem is detected and confirmed, our team will reach out to help you fix it. You are never on your own.
How to check your domain setup
First things first, let's check to make sure your Durable domain setup is correct:
Make sure your custom domain is set as primary
If your site was reactivated recently, your custom domain may no longer be the primary domain.
To set it as primary:
Go to Website > Domain in your Durable dashboard
Click Manage next to your domain
Click Set as primary
Confirm the change
It may take a few minutes to update. If successful, your custom domain will show the Primary tag.
Double-check your Durable DNS values
If you’re not sure what values to use:
Go to Website > Domain
Click Manage next to your domain
Find the correct A and CNAME records
Make sure those exact values match what you’ve entered in your domain provider’s DNS settings
Durable supports two A record IPs — use either 162.159.140.42 or 172.66.0.42, but not both.
Further Troubleshooting:
👀 Reminder - We’re already watching for issues
Our system automatically flags custom domain issues to our team. If a problem is detected and confirmed, our team will reach out to help you fix it. We will diagnose the issue for you.
If you wish to diagnose further, dnschecker.org is a great tool to confirm that your domain’s DNS records are correctly pointing to Durable. This tool helps you check your A and CNAME records across multiple regions around the world.
Before you begin, remember:
The A record uses the name @, pointing to your root domain (for example,
yourdomain.com)The CNAME record uses the name www, pointing to
www.yourdomain.com
Only one A record should be used. Your CNAME must match exactly.
Check your A record
Check your A record
Go to dnschecker.org
Enter your root domain (e.g.
yourdomain.com)Select A from the record type dropdown
Click Search
In the results, look for one of Durable’s supported IP addresses:
162.159.140.42
172.66.0.42
Only one IP address should appear, with green checkmarks across most locations.
[[screenshot – DNSChecker A record input, type selection, search button, and results table marked 1–4]]
Common A record issues:
Common A record issues:
The A record has not propagated yet (wait up to 48 hours)
No A record present (all red Xs)
Multiple A records found (only one should be set)
If you see any of these, log in to your domain provider’s dashboard and adjust the A record settings.
Check your CNAME record
Check your CNAME record
Go to dnschecker.org
Enter your full domain with www. (e.g.
www.yourdomain.com)Select CNAME from the dropdown
Click Search
In the results, confirm that it points to one of Durable’s supported CNAME values:
websites.mydurable.com (recommended)
websites.durable.co (older version, still valid)
Check for other DNS conflicts
Check for other DNS conflicts
CAA records can prevent SSL certificates from being issued. To check, go to DNS Lookup on DNSChecker and search for CAA. If found, remove them from your domain settings.
NS records might point to a parked domain or another service. If present, remove them as they may override your Durable setup.
If you're still having trouble after waiting 48 hours, or if your DNS results don't look right, reach out to our team. We're here to help get your site live.