Public recursive name server

A public recursive name server (also called public DNS resolver) is a name server service that networked computers may use to query the Domain Name System (DNS), the decentralized Internet naming system, in place of (or in addition to) name servers operated by the local Internet service provider (ISP) to which the devices are connected. Reasons for using these services include:

• speed, compared to using ISP DNS services
• filtering (security, ad-blocking, porn-blocking, etc.)
• reporting
• avoiding censorship
• redundancy (smart caching)
• access to unofficial alternative top level domains not found in the official DNS root zone
• temporary unavailability of the ISP's name server

Public DNS resolver operators often cite increased privacy as an advantage of their services; critics of public DNS services have cited the possibility of mass data collection targeted at the public resolvers as a potential risk of using these services. Most services now support secure DNS lookup transport services such as DNS over TLS (DoT), DNS over HTTPS (DoH) and DNS over QUIC (DoQ).

Public DNS resolvers are operated either by commercial companies, offering their service for free use to the public, or by private enthusiasts to help spread new technologies and support non-profit communities.

Notable public DNS service operators

References

External links

• Home page of the DNSCrypt project: Public DNS servers

1. Name server
2. Google Public DNS
3. Domain Name System
4. Comparison of DNS server software
5. Domain Name System Security Extensions
6. 1.1.1.1
7. List of managed DNS providers
8. Open Root Server Network
9. DNS over TLS
10. OpenDNS
11. Alternative DNS root
12. CleanBrowsing
13. Norton ConnectSafe
14. BIND
15. Recursion (computer science)
16. Recursive acronym
17. Windows Server 2008 R2
18. EDNS Client Subnet
19. Blackhole server
20. Response policy zone