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You are viewing an outdated report.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
November 1st, 2004

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
dns3.name-services.com  63.251.83.36  131,082
dns1.name-services.com  63.251.163.102  131,075
dns2.name-services.com  216.52.184.230  131,071
dns4.name-services.com  64.74.96.242  131,020
dns5.name-services.com  212.118.243.118  130,339
ns.buydomains.com  208.254.3.177  128,948
this-domain-for-sale.com  128.121.3.72  128,698
ns1.directnic.com  206.251.177.2  103,835
ns0.directnic.com  204.251.10.100  103,706
yns1.yahoo.com  66.218.71.205  60,051
yns2.yahoo.com  216.109.116.20  60,050
ns8.san.yahoo.com  66.218.71.205  58,518
ns9.san.yahoo.com  216.109.116.20  58,517
ns.schlund.de  195.20.224.97  55,746
ns1.ultsearch.com  62.73.174.194  52,639
ns2.ultsearch.com  212.100.230.160  52,639
ns1.ipowerweb.net  64.70.61.130  49,637
a.ns.interland.net  64.226.28.33  49,319
b.ns.interland.net  69.0.145.33  49,314
c.ns.interland.net  64.77.127.42  48,837

Survey Limitations
Our survey, while having an impressive 18,890,616 sites and 9,869,724 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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