Zyro's nameservers are:
dns1.zyro.com
dns2.zyro.com
If you're asked to specify IPs for the nameservers, use the following:
For dns1.zyro.com: 162.159.26.94 (IPv4) or 2400:cb00:2049:1::a29f:1a5e (IPv6)
For dns2.zyro.com: 162.159.27.149 (IPv4) or 2400:cb00:2049:1::a29f:1b95 (IPv6)
Insert the IP addresses only if required by your domain host. In most cases, the nameservers (dns1.zyro.com and dns1.zyro.com) are enough.
Note: Remember that DNS changes can take up to 24 hours to fully propagate worldwide.