Google Public DNS is a recursive DNS resolver, similar to other publicly available services. We think it provides many benefits, including improved security, fast performance, and more valid results. See below for an overview of the technical enhancements we've implemented.
Google Public DNS is not, however, any of the following:
A top-level domain (TLD) name service. Google is not an operator of top-level domain servers (generic or country-code), such as Verisign.
A DNS hosting or failover service. Google Public DNS is not a third-party DNS application service provider, such as DynDNS, that hosts authoritative records for other domains.
An authoritative name service. Google Public DNS servers are not authoritative for any domain. Google maintains a set of other nameservers that are authoritative for domains it has registered, hosted at ns[1-4].google.com.
A malware-blocking service. Google Public DNS does not perform blocking or filtering of any kind.
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