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DNS Site Operator
November 1st, 2019

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  121.14.154.247  585,703
jm1.dns.com  121.14.154.246  585,703
ns1.bluehost.com  162.159.24.80  357,012
ns2.bluehost.com  162.159.25.175  357,007
dns2.technorail.com  95.110.136.8  306,707
dns.technorail.com  62.149.128.2  306,706
dns4.arubadns.cz  81.2.216.125  306,388
dns3.arubadns.net  95.110.220.5  306,387
ns1.dreamhost.com  64.90.62.230  281,429
ns2.dreamhost.com  208.97.182.10  281,422
ns3.dreamhost.com  66.33.205.230  281,340
ns01.one.com  195.206.121.10  255,256
ns02.one.com  195.206.121.138  255,255
ns1.myhostadmin.net  118.123.249.114  248,475
ns2.myhostadmin.net  120.52.19.214  248,465
ns4.myhostadmin.net  211.149.230.100  248,447
ns3.myhostadmin.net  118.123.249.114  248,447
ns5.myhostadmin.net  118.123.249.114  248,445
ns6.myhostadmin.net  183.131.155.224  248,445
f1g1ns2.dnspod.net  101.226.220.16  242,322

Survey Limitations
Our survey, while having an impressive 68,460,830 sites and 30,528,531 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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