Hi to everybody,
I migrated from SeFlow, good service but awful support.
Only in the person of Matteo Berlonghi.
No professional skill, but I understood how works DNS world.
This is wants to be my personal diary.
Difference between Authority and Registrar.
usefull link to find which nameserver are registered to the Authority:
https://intodns.com/saic.it or http://mxtoolbox.com
in the DNS zone (NS record) you have to insert the nameserver that the Registrar sent to Authority.
to see the propagation: https://www.whatsmydns.net