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You are viewing an outdated report. The latest version of this report was published on October 1st, 2021


    
DNS Site Operator
September 1st, 2008

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
dns1.name-services.com  69.25.142.42  348,691
dns2.name-services.com  216.52.184.248  348,677
dns3.name-services.com  63.251.92.200  348,534
dns4.name-services.com  69.64.145.225  348,528
dns5.name-services.com  70.42.37.7  347,012
ns1.dreamhost.com  66.33.206.206  191,313
ns2.dreamhost.com  208.96.10.221  191,283
ns3.dreamhost.com  66.33.216.216  191,061
yns1.yahoo.com  66.218.71.205  183,645
yns2.yahoo.com  66.196.84.168  183,639
ns8.san.yahoo.com  66.218.71.205  183,579
ns9.san.yahoo.com  66.196.84.168  183,578
dns2.technorail.com  62.149.132.2  173,186
dns.technorail.com  62.149.128.2  173,184
ns1.sedoparking.com  212.227.86.6  132,218
ns2.sedoparking.com  217.160.208.235  132,215
ns2.xinnetdns.com  123.100.7.207  114,148
ns2.xinnet.cn  123.100.7.203  114,129
ns2.rackspace.com  65.61.188.4  105,496
ns.rackspace.com  69.20.95.4  105,453

Survey Limitations
Our survey, while having an impressive 39,848,787 sites and 19,894,600 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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