No, you cannot.. AirVPN's DDNS is designed so that a name you enter when forwarding a port resolves to the server a client is connected to, and so that this name can still be used to reach some client when the connection breaks and it happened to connect to another server. In other words, it only updates A/AAAA RRs, as DDNS is supposed to do, and only in relation to a VPN connection to AirVPN (which I believe will be blasphemous at work, going by the name pcwork). It is not possible to enter your own NS RRs.
Be advised that the domain for DDNS names is airdns.org.