Is Neustar UltraDNS Secure?
Independent privacy and security audit of Neustar UltraDNS DNS servers, with live monitoring data.
Last updated March 26, 2026
Neustar UltraDNS passes some security checks but is missing support for certain features. Review the details below.
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) | Not supported | DNS queries are sent in plain text over this protocol. |
| DNS-over-HTTPS (DoH) | Not supported | No DoH endpoint available. |
| Logging Policy | Unknown retention policy | |
| Reliability | 100% | Based on continuous monitoring from our probe network. |
Neustar UltraDNS DNS Addresses
| Type | IP Address | |
|---|---|---|
| Primary | 64.6.64.6 |
|
| Secondary | 64.6.65.6 |
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Frequently Asked Questions
Is Neustar UltraDNS safe to use?
Neustar UltraDNS passes some security checks but lacks support for certain features like encrypted DNS or DNSSEC. It is adequate for basic use but privacy-conscious users may want a more feature-complete provider.
Does Neustar UltraDNS log DNS queries?
Neustar UltraDNS logging policy: Unknown retention policy. Always review the provider's current privacy policy for the latest details.
Does Neustar UltraDNS support encrypted DNS?
Neustar UltraDNS does not support encrypted DNS (neither DoT nor DoH). Your DNS queries travel in plain text and can be monitored by your ISP.
How reliable is Neustar UltraDNS?
Neustar UltraDNS (64.6.64.6) has a reliability score of 100% based on our continuous monitoring. This is excellent uptime.
What are the DNS addresses for Neustar UltraDNS?
Primary: 64.6.64.6, Secondary: 64.6.65.6. Configure both for redundancy.