DNS Propagation Explained
When you change DNS settings, it takes time for the changes to spread worldwide.
What Is Propagation?
DNS information is cached by servers globally. When you make changes, each server must update its cache. This happens gradually.
Typical Timeframes
- Nameserver changes: 24-48 hours
- A record changes: 1-4 hours
- MX record changes: 1-4 hours
- TTL-based: Up to the TTL value
During Propagation
- Some visitors see old site, others see new
- Email may route to old or new server
- This is normal and temporary
Checking Propagation
Use these tools:
- whatsmydns.net - Check from multiple locations
- dnschecker.org - Global DNS propagation
Speed Up Propagation
- Lower TTL before making changes
- Clear your local DNS cache
- Try different DNS servers (8.8.8.8)
Clear Local DNS Cache
Windows:
ipconfig /flushdns
Mac:
sudo dscacheutil -flushcache