There’s a lot of different tools and ways that will help you while troubleshooting domain resolution issues, so let’s take a look at some of them.
Check that your domain is using the right Name Servers
It may sound silly, but a lot of people that complain about their domain not working properly when they try to visit their website have this problem. If your site doesn’t load the first thing you have to check is that you’re using the right Name Servers, which should be provided by your hosting/service provider.
Remember that the Name Servers may take up to 24-48 hours to propagate around the world after you’ve assigned them to your domain.
To check if your domain is using the right Name Servers or not, use a tool like whois or just verify in your registrant’s control panel.
Use Dig command
Dig is a great tool to check DNS records and troubleshoot DNS records issues. For example to check the A record of your domain, open your system’s console application and type:
dig A mydomain.com
This should return you A record, so you can check if the IP to which your site points is ok.
Check DNS record propagation
To check how the DNS propagation is going you can use our own tool at https://dnspropagation.net/
Simply write the record you want to check, select the type of record and hit Start or simply Enter. In a few seconds, you will have your result have. For example, to check dnspropagation.net’s MX record, type “dnspropagation.net” in the box, select MX in the record box and push Enter.
You can do this with any record you want to check and as many times as you like. Keep in mind to clean your browser’s cache from time to time if you check the same record too often, because if the result is cached by your browser you won’t see the updated information.
Check DNS configuration issues
You can check for any DNS configuration issues on your DNS server, or inside your DNS zone records using tools like this free DNS report from dnslog.com
It will help you to detect any DNS issues on your server or zones and will give you suggestions on how to fix each one of them.