Understanding DNS Propagation in Plesk

When you add a new domain, change DNS records, or move your website to a new server, the changes do not take effect instantly worldwide. This delay is called DNS propagation. This guide explains what it is, why it happens, and how to check if your changes have taken effect.

What Is DNS Propagation?

DNS propagation is the process of updating DNS records across all DNS servers worldwide. When you change a DNS record, the update starts at your authoritative DNS server. Other DNS servers around the world then fetch and cache this new information over time.

How Long Does Propagation Take?

• Standard TTL: Up to 48 hours for changes to fully propagate worldwide.
• Lower TTL: If your records have a low TTL (e.g., 300 seconds), propagation can happen in minutes.
• New domains: New domain registrations can take up to 24 hours to become accessible.

Checking DNS Propagation

Use these online tools to check if your DNS changes have propagated:

• https://dnschecker.org — Shows DNS resolution from multiple locations worldwide.
• https://whatsmydns.net — Similar to DNS Checker, checks propagation from various locations.
• https://mxtoolbox.com/DNSLookup.aspx — Checks individual DNS records.

To check from your computer:

• Windows: Open Command Prompt and type nslookup yourdomain.com
• macOS/Linux: Open Terminal and type dig yourdomain.com or nslookup yourdomain.com

Speeding Up DNS Propagation

While you cannot force global propagation, you can speed it up by:

• Lowering your TTL before making changes — set TTL to 300 seconds (5 minutes) at least 24 hours before planned DNS changes.
• Clearing your local DNS cache — this only affects your own computer:
  • Windows: Run ipconfig /flushdns in Command Prompt.
  • macOS: Run sudo dscacheutil -flushcache in Terminal.
  • Linux: Run sudo systemd-resolve --flush-caches.
• Using a different DNS resolver — try 8.8.8.8 (Google) or 1.1.1.1 (Cloudflare) to check if changes are visible.

Important Notes

• DNS propagation is gradual — different locations may see different results at different times.
• During propagation, some visitors may see the old site and others the new one.
• Changes to SSL certificates and email settings may also be affected by DNS propagation timing.
• Be patient — most DNS changes propagate within a few hours, not the full 48 hours.

Troubleshooting

Your site shows on some devices but not others:

• This is normal during DNS propagation. Different devices and networks may be using different cached DNS records.
• Flush the DNS cache on the device that shows the old result.

DNS changes have not propagated after 48 hours:

• Verify the DNS records are correct in Plesk (Websites & Domains → DNS).
• Confirm the domain is using the correct nameservers at your registrar.
• Contact your hosting provider for assistance.