Overview
Quad9 operates a public dns resolver identified by AS19281.
The record includes 9.9.9.0/24 as a representative IPv4 prefix. It is not the network’s complete or permanent address space.
Current services include Public recursive anycast DNS, DNSSEC validation, privacy-oriented resolution, and optional malicious-domain blocking.
This record describes an autonomous system or publicly routed Internet network. It does not identify a physical Data Center, prove who operated an individual request, or establish that every address announced by the ASN is used for the same service.
Network prefixes
These are documented prefixes associated with this routed network. They are not necessarily the network’s complete current address space.
- Representative prefix
-
9.9.9.0/24
IPv4 · Active · RPKI Valid · checked 2026-08-07
Provider and network
- Network / Provider Name
- Quad9
- Registered / Operating Organization
- Quad9 Foundation
- ISP / Network Operator
- Quad9 Foundation
- ASN
-
AS19281 - ASN Name
- Quad9
- Network Name
- Quad9
- Current Services
- Public recursive anycast DNS, DNSSEC validation, privacy-oriented resolution, and optional malicious-domain blocking
- Provider Type
- DNS provider
- Network Type
- Public DNS resolver
Network scope
- Network Country
- CH
Traffic and handling
- Traffic Classification
- Public DNS Resolver Traffic
- Traffic Label
- Public DNS Resolver
- Risk Level
- Low
- Recommended Action
- Treat as DNS-service infrastructure. Do not classify an HTTP request as proxied merely because an address is associated with the resolver network.
- Default Rule Action
- Log
- Common Pattern
- Traffic is primarily recursive DNS service traffic, monitoring, and supporting platform operations rather than shared HTTP reverse-proxy traffic.
- Detection Notes
- Match AS19281 and representative CIDR 9.9.9.0/24 as Quad9 public recursive DNS infrastructure. DNS resolver traffic is not CDN or reverse-proxy visitor traffic.
Relationships
- Operator
- Quad9 Foundation Evidence Checked 2026-08-07