Quad9 Public DNS

Explore this developer service’s free allowance, critical restrictions and official documentation before deploying.

INCLUDED FREE ALLOWANCE

Free public recursive DNS resolver with malware/phishing blocking, DNSSEC validation, DNS-over-HTTPS and DNS-over-TLS; no account or published monthly query quota for ordinary use.

Plan details

Plan: Ongoing free allowance
Credit card: Not required
Commercial use: Allowed
Last checked: 2026-10-25

Important restrictions

Recursive DNS only: does not host authoritative DNS zones or provide CDN. ISPs, service providers and other large organizations should contact Quad9 before sending large-scale DNS traffic; no business SLA or per-domain DNS management.

View official documentation

Independent community listing, not affiliated with the provider. Always check the latest billing policy and quotas before enabling paid usage.