The Domain Name System (DNS) is like the address book of the internet, translating human-readable domain names into machine-readable IP addresses. When you purchase a new domain or make changes to your DNS settings, such as updating your DNS records or switching web hosting providers, it can take some time for these changes to propagate across the internet. During this period, you might encounter issues where your domain appears to be inaccessible or not working as expected. In this article, we’ll explore common DNS propagation issues and how to troubleshoot them.

Understanding DNS Propagation

DNS propagation refers to the time it takes for changes to DNS records to be distributed and updated across DNS servers worldwide. When you make changes to your DNS settings, such as updating your A records, CNAME records, or changing name servers, these changes need to propagate to DNS servers across the globe. This process usually takes anywhere from a few minutes to 48 hours, although in most cases, changes are visible within a few hours.

Depending on scenario, there could be one or a couple of reasons why your domain doesn’t work. Some common issues have been collated and discussed below.

New Domains

Why doesn’t my new domain work after registering it?

  1. Propagation – probably DNS has not propagated fully yet, standards to date states propagation can take from 24 up to 78 hours. So, be patient. Sometimes, it can take a few minutes or hours only
  2. Domain Propagation checker – you may use online DNS propagation tools like https://dnschecker.org/, select and monitor especially the NS option; all server lookups from around the globe should be checked green to indicate domain is fully propagated and working
  3. Misconfigurations or altering of DNS entries from your cPanel or webhosting admin side; double check with your domain registrar and/or webhosting support; they normally accommodate checking on these settings for you

Existing Domains

Why doesn’t my domain work anymore, it used to work before?

  1. Non-renewal of domain – depending on where your domain registrar or on the popularity or demand of the domain, non-renewal can either simply render your domain available again for anyone to register and purchase it, or worse scenario, non-renewal can trigger domain brokers to renew it and resell it, in most cases in an automated manner, and at a much higher bidding price
  2. Misconfigurations or altering of DNS entries from your cPanel or webhosting admin side
  3. Content Delivery Networks (CDNs) / Cloudflare – we have seen common experiences where CDNs like the popular Cloudflare had been implemented, or at least had been attempted to, but were not configured correctly, thus the reason why the domain simply stopped working

Common DNS Propagation Issues

  1. Propagation Delay: The most common issue is simply waiting for DNS propagation to complete. It’s essential to understand that DNS changes don’t take effect instantaneously across all servers. The delay can vary depending on factors like TTL (Time to Live) settings, DNS caching by internet service providers (ISPs), and how frequently DNS records are updated by DNS servers.
  2. Cached DNS Records: DNS records are cached at various levels, including your local computer, your ISP’s servers, and other DNS servers around the world. If your DNS records have recently changed, but your computer or ISP’s DNS server still holds the old cached records, you may experience connectivity issues. Flushing your DNS cache can help resolve this problem.
  3. Incomplete DNS Configuration: Incorrectly configured DNS records can cause domain resolution issues. Ensure that your DNS records are correctly set up with the appropriate values, such as A records pointing to the correct IP addresses, MX records for email, and CNAME records for aliases.
  4. Name Server Propagation: When changing web hosting providers or domain registrars, you may need to update your domain’s name servers. While this change propagates, some DNS servers may still be pointing to the old name servers, resulting in DNS resolution failures.
  5. DNSSEC Configuration: DNS Security Extensions (DNSSEC) provide an added layer of security to DNS. However, misconfigured DNSSEC settings can lead to DNS resolution failures. Ensure that DNSSEC is correctly configured for your domain.
  6. SSL / HTTPS – for secure socket layer (SSL) and secure HTTPS troubleshooting, you may use online tools and SSL checkers like https://www.whynopadlock.com/

Troubleshooting DNS Propagation Issues

  1. Check DNS Records: Use online DNS lookup tools to verify that your DNS records are correctly configured and resolving to the intended IP addresses.
  2. Flush DNS Cache: Flush the DNS cache on your local computer and router to ensure that you’re not using outdated DNS records. You can do this by running commands like ipconfig /flushdns (Windows) or sudo dscacheutil -flushcache (macOS).
  3. Check Name Server Configuration: Confirm that your domain is using the correct name servers, especially if you’ve recently updated them. You can check this information through your domain registrar’s control panel.
  4. Use DNS Propagation Checkers: Several online tools allow you to check the status of DNS propagation for your domain across different DNS servers worldwide. These tools can give you insights into whether DNS changes have been fully propagated. Such tool as mentioned: https://dnschecker.org/
  5. Contact Your DNS Provider: If you’ve exhausted all troubleshooting steps and your domain still isn’t working as expected, reach out to your DNS provider or domain registrar for assistance. They can often provide insights into any issues affecting DNS resolution for your domain.

Conclusion

DNS propagation issues are a common occurrence when making changes to DNS settings for your domain. Understanding the factors that influence DNS propagation and knowing how to troubleshoot common issues can help minimize downtime and ensure that your domain remains accessible to users worldwide. By following the steps outlined in this article, you can effectively diagnose and resolve DNS propagation issues, ensuring smooth and uninterrupted access to your website or online services.