English | Deutsch | Español | Português
new user
 Survey Data Mining: Home | Order/Renew | FAQ | Archive | Glossary

You are viewing an outdated report. The latest version of this report was published on February 1st, 2020

DNS Site Operator
November 1st, 2012

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.

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


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  431,360
dns2.name-services.com  431,351
dns3.name-services.com  431,333
dns4.name-services.com  430,973
dns5.name-services.com  429,421
ns1.bluehost.com  389,590
ns2.bluehost.com  389,567
ns1.dreamhost.com  384,884
ns2.dreamhost.com  384,850
ns3.dreamhost.com  384,383
dns.technorail.com  287,679
dns2.technorail.com  287,677
dns3.arubadns.net  285,684
dns4.arubadns.cz  285,684
ns01.one.com  236,710
ns02.one.com  236,709
ns1.dns.ne.jp  236,339
ns2.dns.ne.jp  236,253
ns.namespace4you.de  184,830
ns2.namespace4you.de  184,825

Survey Limitations
Our survey, while having an impressive 76,586,204 sites and 33,955,321 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).

Home | About Us | Contact Us | Partner Programs | Developer APIs | Privacy | Mailing Lists | Abuse
Security Audits | Managed DNS | Network Monitoring | Site Analyzer | Internet Research Reports
Web Probe

© 1998-2020 E-Soft Inc. All rights reserved.