English | Deutsch | Español | Português
new user
 Survey Data Mining: Home | Order/Renew | FAQ | Archive | Glossary
DNS Site Operator
December 1st, 2019

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
jm2.dns.com  593,416
jm1.dns.com  593,416
ns1.bluehost.com  357,663
ns2.bluehost.com  357,659
dns2.technorail.com  309,311
dns.technorail.com  309,310
dns4.arubadns.cz  308,945
dns3.arubadns.net  308,944
ns1.dreamhost.com  282,261
ns2.dreamhost.com  282,256
ns3.dreamhost.com  282,157
ns01.one.com  256,937
ns02.one.com  256,936
ns1.ecpage.com  245,878
ns2.ecpage.com  245,878
ns1.myhostadmin.net  245,285
ns2.myhostadmin.net  245,275
ns3.myhostadmin.net  245,258
ns4.myhostadmin.net  245,257
ns5.myhostadmin.net  245,256

Survey Limitations
Our survey, while having an impressive 67,993,680 sites and 30,943,793 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

© 1998-2019 E-Soft Inc. All rights reserved.