Quad9

QUAD9 is a public recursive DNS resolver operated by the Quad9 Foundation, a Swiss public-benefit non-profit based in Zürich. Public materials describe its focus as privacy-oriented DNS resolution with optional threat-domain blocking, plus support for encrypted DNS transports.

In PeeringDB, Quad9 is listed with ASN AS19281 and notes that the service is delivered via anycast across 230+ locations in 100+ nations, using upstream partners rather than direct peering from AS19281. The project’s documentation and service pages publish the well-known anycast resolver addresses, including 9.9.9.9 and 149.112.112.112 (IPv4) and 2620:fe::fe and 2620:fe::9 (IPv6), with separate endpoints for “no blocking” variants.

Public user feedback is mixed and fragmented: many reports describe stable everyday use, but there are also recurring community threads about routing/latency variations and occasional regional reachability incidents. There is no single dominant review source with consistent scoring, so the reputation signal remains average due to limited, anecdotal coverage.