DNS Cache Flush
Online DNS cache flush tool with OS detection, command generation, TTL propagation estimate, and DNS verification
This tool sends DNS lookup requests to public resolvers through server-side API calls to verify cache refresh results.
Detected Environment
Operating System
Unknown
Browser
Unknown
Recommended DNS flush commands are ready for Unknown
DNS Cache Flush Commands
DNS Refresh Verification
TTL Lookup and Propagation Estimate
Browser Cache Cleanup
Chrome / Edge
- Open chrome://net-internals/#dns
- Click Clear host cache
- Or clear browser cache and retry
Firefox
- Clear browser cache and cookies
- Restart browser and test again
Safari
- Clear history from browser menu
- Include cache data in cleanup
Router DNS Cleanup
If issue remains after local flush, clear router-side DNS cache:
- Sign in to router admin panel
- Open DNS or DHCP settings
- Switch DNS resolver and save
- Restart router and client devices
Common public DNS: Google 8.8.8.8, Cloudflare 1.1.1.1
FAQ
Why flush DNS cache?
After migration or DNS switch, stale cache may keep old IP. Flushing helps retrieve latest records sooner.
Is DNS cache flush safe?
Yes. It only clears temporary resolver cache and does not remove system files or business data.
Should I flush regularly?
Usually no. It is mainly needed during cutovers, DNS errors, emergency troubleshooting, or rollback checks.
Quick Actions
Documentation
DNS cache flush tool generates cross-platform flush commands and verifies outcomes with DNS and TTL checks, helping developers and operators reduce stale-resolution issues during domain and infrastructure changes.
How to Use
- Detect current OS and view recommended command.
- Run command and verify domain lookup results.
- Use TTL output to estimate propagation window.
- Also clear browser and router cache when needed.
Use Cases
- Site migration still resolves to old IP
- DNS cutover not fully propagated
- CDN or load-balancer switch validation
- Operational incident troubleshooting
Operational Tips
- Lower TTL before production DNS change when possible.
- Compare lookup results before and after flush.
- Run flush commands with proper admin privileges.