When choosing services, keep in mind that public DNS providers represent a wide range of organizations with different motivations.

Circumvention of censorship or geoblocking: Using an alternative resolver can help get around DNS blocks due to government- or ISP-level restrictions.

Performance and feature improvements: A public DNS service may be better in a number of different ways, including speed, reliability, caching, security, validity of results and features like parental control.

However, there are a number of reasons why users might change their DNS configuration to use public third-party DNS resolvers, including: ThousandEyes Why Use Public DNS?īy default, your device will use your company’s or ISP’s DNS servers. DNS lookup time, in turn, is directly affected by latency to the DNS server. While it’s just the first step of many in the page load process (see the below image), any increase in DNS lookup time will directly increase load times. DNS can also have a substantial impact on page load time and web page performance. If a given service’s DNS records are unavailable, the service is effectively down and inaccessible to everyone.

The Domain Name System (DNS) is the internet’s system for converting alphabetic web addresses into numeric IP addresses. We observed a wide range of performance across different services, both globally and from region to region. In this article we’ll dive into our results from testing 10 of the most popular public DNS resolvers, with the goal of helping you make informed conclusions about your choice of provider. ThousandEyes, a network intelligence company with the ability to monitor performance from hundreds of vantage points across the Internet, has insight into a variety of services across the globe, including public DNS service providers.

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