For example your company domain is resellerdomain.com. Hence you have to create your nameserver with registrar using the following settings
ns1.resellerdomain.com - 126.96.36.199
ns2.resellerdomain.com - 188.8.131.52
Once completed, you may change your client's nameserver to use your private nameserver.
If you wish to use our white labeled nameserver, use the following nameserver on all of your domain
ns1.adminz.net - 184.108.40.206
ns2.adminz.net - 220.127.116.11