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DNS Site Operator
September 1st, 2020

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
jm2.dns.com  119.167.180.140  816,322
jm1.dns.com  119.167.180.140  816,322
ns1.bluehost.com  162.159.24.80  313,352
ns2.bluehost.com  162.159.25.175  313,345
dns2.technorail.com  95.110.136.8  283,527
dns.technorail.com  94.177.210.13  283,526
dns4.arubadns.cz  81.2.216.125  283,257
dns3.arubadns.net  95.110.220.5  283,256
ns1.dreamhost.com  64.90.62.230  248,994
ns2.dreamhost.com  208.97.182.10  248,987
ns3.dreamhost.com  66.33.205.230  248,898
ns01.one.com  195.206.121.10  240,296
ns02.one.com  195.206.121.138  240,295
ns5.kasserver.com  85.13.128.3  220,370
ns6.kasserver.com  85.13.159.101  220,360
ns1.dns.ne.jp  61.211.236.1  211,965
ns2.dns.ne.jp  133.167.21.1  211,952
ns4.myhostadmin.net  118.112.237.30  194,851
ns3.myhostadmin.net  118.123.249.114  194,832
ns1.myhostadmin.net  118.123.249.114  194,823

Survey Limitations
Our survey, while having an impressive 74,226,756 sites and 27,605,277 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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