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You are viewing an outdated report. The latest version of this report was published on April 1st, 2021


    
DNS Site Operator
February 1st, 2021

This report details the names and locations of all DNS servers on the internet, as well as the number of domains that are serviced by these servers. In this fashion, we can discover

  • the number of sites hosted by ISPs
  • the number of sites hosted by hosting companies that use an ISP's facilities, but run their own name servers
  • the number of sites hosted by specialty DNS service providers
  • the organizations that choose to operate their own DNS servers rather than to use those of their ISP/hosting provider.

The survey works by determining each month the authoritative name server for each host (and more accurately, each domain) in our survey. We then count the number of domains hosted on each DNS server.

Search
Curious about the size of a the domain set handled by a particular ISP's name servers? Try searching for the ISP's name server. For example, to find Exodus' name servers, try
exodus.

    

Top 20 by Host Name
The top 20 name servers ranked according to the number of domains handled by each name server, with a name server uniquely identified by its fully qualifed name, are shown below.

Name Server Name   Name Server IP   Domains
jm1.dns.com  119.167.180.140  715,433
jm2.dns.com  183.253.57.200  715,433
ns1.bluehost.com  162.159.24.80  305,455
ns2.bluehost.com  162.159.25.175  305,451
dns.technorail.com  94.177.210.13  281,477
dns2.technorail.com  95.110.136.8  281,477
dns4.arubadns.cz  81.2.216.125  281,219
dns3.arubadns.net  95.110.220.5  281,217
ns1.dreamhost.com  162.159.26.24  243,475
ns2.dreamhost.com  162.159.27.142  243,473
ns3.dreamhost.com  162.159.27.84  243,446
ns01.one.com  195.206.121.10  236,095
ns02.one.com  195.206.121.138  236,094
ns5.kasserver.com  85.13.128.3  222,831
ns6.kasserver.com  85.13.159.101  222,817
ns1.dns.ne.jp  61.211.236.1  214,586
ns2.dns.ne.jp  133.167.21.1  214,575
dns1.registrar-servers.com  156.154.132.200  149,233
dns2.registrar-servers.com  156.154.133.200  149,228
ns2.xserver.jp  157.112.182.221  148,803

Survey Limitations
Our survey, while having an impressive 75,489,280 sites and 26,797,217 domains in the data set, does not include all web sites and domains. We only include those that we consider active, which, by our definition, means we found the site via a link from somewhere else. Sites not linked by anyone are by definition not included in the survey.

We also actively drop sites out of the survey that fail to respond 3 consecutive months to our HTTP queries. So, while a DNS server might still respond with information for a domain, if there is no active web site that we can reach for the domain in question, then the domain is not included in this survey at all, even if it still has other functioning services (such as email).



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