[dns-operations] which registries test nameservers before delegations?

[sthaug at nethelp.no]

> I know .IS does and I'm pretty sure .NL does, but what other registries
> do pre-delegation testing on domains before they will register (or
> transfer) them?

Norway (.no) does. See for instance

       https://www.norid.no/en/registrar/sos/#tek2

Steinar Haug, AS2116