This list sorts nameservers by hostname, another list sorts nameservers by IP address and displays all hostnames pointing to a nameserver's IP can be found here.
This page displays a list of domain names that have nameservers under them, so if NS1.EXAMPLE.COM is a nameserver, EXAMPLE.COM would be listed here.
The list is ordered by the cummulative number of domain names managed by nameservers under these domains. At the moment, there are 112941 domain names with one or more nameservers under them.

1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | ... | 718 | ... | 1422 | ... | 2126 | ... | 2831 | ... | 3535 | ... | 4239 | ... | 4943 | ... | 5648

Nameserver Parent HostNameScore by number of domains
DOMAINCONTROL.COM29497843 GoDaddy and Wild West Domains Resellers About
NAME-SERVICES.COM5081612 Register.com's resellers
IIDNS.COM3736458
HICHINA.COM3098473
WORLDNIC.COM2233324 Network Solutions
DNSPOD.NET1845164
REGISTRAR-SERVERS.COM1708193
BLUEHOST.COM1668165
REGISTER.COM1544062 Register.com, Same servers as NAME-SERVICES.COM
NAMEBRIGHTDNS.COM1455003
DREAMHOST.COM1330345
SEDOPARKING.COM971158
1AND1.COM933917
CASHPARKING.COM837086 GoDaddy parking About
WORDPRESS.COM805220
MYHOSTADMIN.NET749880
GANDI.NET721364
XSERVER.JP659745
CLOUDFLARE.COM643618
123-REG.CO.UK596782