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You are viewing an outdated report. The latest version of this report was published on December 1st, 2017


    
DNS Site Operator
August 1st, 2003

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  104,797
ns2.buydomains.com  128.121.3.74  75,492
dns2.name-services.com  216.52.184.230  64,411
dns1.name-services.com  63.251.163.102  64,402
dns3.name-services.com  63.251.83.36  64,396
dns4.name-services.com  64.74.96.225  64,387
dns5.name-services.com  212.118.244.163  64,289
a.ns.interland.net  64.226.28.33  51,005
b.ns.interland.net  69.0.145.33  50,978
c.ns.interland.net  64.77.127.42  50,867
ns1.mydomain.com  64.94.117.195  40,536
ns2.mydomain.com  216.52.121.228  40,503
ns3.mydomain.com  66.150.161.130  40,170
ns4.mydomain.com  63.251.83.74  40,063
ns1.secure.net  192.220.124.10  39,650
ns2.secure.net  192.220.125.10  39,648
ns1.ultsearch.com  213.130.63.232  38,673
ns2.ultsearch.com  212.100.230.160  38,673
ns8.san.yahoo.com  66.218.71.205  38,599
ns9.san.yahoo.com  216.109.116.20  38,595

Survey Limitations
Our survey, while having an impressive 11,899,618 sites and 7,198,149 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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