Possible solutions of your questions

Hello.

Specify the name of the domain.

Hello.

You have to register in the settings of Your doena our DNS:

ns*.hostven**.EN  IP:**.***.**.*** 
ns*.hostven**.EN  IP:**.***.**.***

the IP address is optional, only if required.

New nostrike will take effect immediately, it takes in average *-** hours.

Specify the no IP

Just these two entries:

ns*.hostven**.EN
ns*.hostven**.EN