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You are viewing an outdated report.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


    
DNS Site Operator
February 1st, 2006

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
dns2.name-services.com  216.52.184.230  143,224
dns1.name-services.com  69.25.142.1  143,213
dns3.name-services.com  63.251.92.193  142,798
dns4.name-services.com  64.74.96.242  142,254
dns5.name-services.com  212.118.243.118  141,801
dns.technorail.com  62.149.128.2  74,243
dns2.technorail.com  62.149.132.2  74,198
ns1.directnic.com  204.13.172.154  71,427
ns0.directnic.com  204.251.10.100  71,389
wsc1.jomax.net  64.202.165.4  70,745
wsc2.jomax.net  64.202.167.50  70,734
ns.xinnetdns.com  210.51.170.66  70,055
ns.xinnet.cn  210.51.171.209  69,983
ns1.ipowerweb.net  64.70.61.130  68,160
yns1.yahoo.com  66.218.71.205  64,630
yns2.yahoo.com  216.109.116.20  64,582
ns1.livedns.co.uk  213.171.192.250  64,113
ns2.livedns.co.uk  213.171.193.250  64,092
ns1.ipowerdns.com  66.235.217.202  62,160
ns2.rackspace.com  65.61.188.4  51,968

Survey Limitations
Our survey, while having an impressive 19,123,166 sites and 12,033,061 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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