DNS Server Health Check
Test nameserver responsiveness, DNSSEC status, and latency for any domain or custom server list
Run DNS Server Health Check
Enter a domain to auto-fetch its nameservers, or paste a custom list of DNS server IPs/hostnames
We will automatically fetch and check all nameservers for this domain
DNS Health Check Features
Comprehensive nameserver analysis and monitoring
Server Responsiveness
Test DNS server availability and query response time in real time
DNSSEC Validation
Detect whether DNS Security Extensions are active on each nameserver
Latency Analysis
Measure per-server query response times and surface performance issues
Bulk Server Testing
Check multiple DNS servers simultaneously from a domain or custom list
Frequently Asked Questions
Yes. Switch to the "DNS Servers" tab and paste IPs or hostnames (comma or newline separated) to run the health check against your own list.
No. The checker is read-only and only sends standard DNS queries to evaluate responsiveness.
The tool queries each nameserver for RRSIG records. A successful response indicates the server is returning DNSSEC-signed data.
Under 50 ms is excellent, 50–100 ms is good, 100–200 ms is acceptable, and above 200 ms indicates a potential performance issue.