DNS Not Resolving — How to Fix Domain Name Errors

What is a DNS Resolution Error?

A DNS (Domain Name System) error occurs when your device cannot translate a domain name (such as example.com) into an IP address. Symptoms include “DNS_PROBE_FINISHED_NXDOMAIN” or “Server IP address could not be found”.

Common Causes

• Your ISP’s default DNS resolver is experiencing downtime
• Stale or corrupted local DNS cache on your computer or router
• Domain name expired or DNS records were recently modified
• Local firewall or antivirus software blocking port 53

How to Fix DNS Resolution Errors

1. Flush DNS cache:
   
   Windows: ipconfig /flushdns
   
   Mac: sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder
2. Switch to reliable public DNS:
   
   Cloudflare DNS: 1.1.1.1 and 1.0.0.1
   
   Google DNS: 8.8.8.8 and 8.8.4.4
3. Restart your home Wi-Fi router to clear router DNS caches.
4. Verify domain status on IsDownNow.