Is Quad9 Secure?
Independent privacy and security audit of Quad9 DNS servers, with live monitoring data.
Last updated March 26, 2026
Quad9 meets our security criteria with strong encryption support, DNSSEC validation, and no NXDOMAIN hijacking.
Security Audit Results
| Check | Result | Details |
|---|---|---|
| DNSSEC Validation | Yes | Validates DNSSEC signatures, protecting against DNS spoofing. |
| NXDOMAIN Hijacking | No | Returns proper NXDOMAIN responses for non-existent domains. |
| DNS-over-TLS (DoT) | Supported | Encrypted DNS available on port 853. Prevents ISP snooping on DNS queries. |
| DNS-over-HTTPS (DoH) | Supported | HTTPS-based encrypted DNS available. Works through firewalls and is supported by most browsers. |
| Logging Policy | No personal data logged | |
| Reliability | 100% | Based on continuous monitoring from our probe network. |
Quad9 DNS Addresses
| Type | IP Address | |
|---|---|---|
| Primary | 9.9.9.9 |
|
| Secondary | 149.112.112.112 |
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Frequently Asked Questions
Is Quad9 safe to use?
Quad9 passes our security audit with DNSSEC validation, no NXDOMAIN hijacking, and encrypted DNS support. It is safe for everyday use.
Does Quad9 log DNS queries?
Quad9 logging policy: No personal data logged. Always review the provider's current privacy policy for the latest details.
Does Quad9 support encrypted DNS?
Quad9 supports both DNS-over-TLS (DoT) and DNS-over-HTTPS (DoH), providing full encryption for your DNS queries.
How reliable is Quad9?
Quad9 (9.9.9.9) has a reliability score of 100% based on our continuous monitoring. This is excellent uptime.
What are the DNS addresses for Quad9?
Primary: 9.9.9.9, Secondary: 149.112.112.112. Configure both for redundancy.