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You are viewing an outdated report.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
August 1st, 2002

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
ns.buydomains.com  208.254.3.177  103,481
ns2.buydomains.com  128.121.3.71  103,366
a.ns.interland.net  64.226.28.33  46,468
b.ns.interland.net  66.111.73.173  46,454
c.ns.interland.net  64.77.127.42  46,335
dns2.nic.it  193.205.245.8  31,399
ns1.secure.net  192.220.124.10  31,198
ns2.secure.net  192.220.125.10  31,174
ns2.host4u.net  209.150.129.3  27,491
ns.host4u.net  209.150.128.30  27,489
dns2.earthlink.net  207.217.77.12  27,411
dns3.earthlink.net  207.217.120.13  27,401
dns1.earthlink.net  207.217.126.11  27,383
hearsay.earthlink.net  207.69.188.201  26,997
speakeasy.earthlink.net  207.69.188.200  26,837
rumor.earthlink.net  207.69.188.202  26,168
ns.nameservers.net  207.158.192.40  25,984
ns2.mydomain.com  216.148.221.142  25,966
ns1.mydomain.com  216.148.213.141  25,965
ns2.nameservers.net  209.41.31.13  25,964

Survey Limitations
Our survey, while having an impressive 8,843,170 sites and 5,143,787 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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