I have a domain, say, x.com registered with Direct. I have also created name servers ns1.x.com and ns2.x.com there. I have about 15 other domains which are using these name servers.
Now I have bought a reseller account in OnlineNic and I am planning to transfer all my domains there. I guess I'll have to transfer x.com first and register nameservers accordingly. But I don't seem to find any link to register name servers in OnlineNic reseller control panel. In Direct client control panel, the link is called something like 'create child nameservers'.
I don't want any downtime with any of my domains for DNS problem in the transfer process.
So, there are no such nameservers as ns1/ns2...nsN.x.com?
If there are, you wouldn't need to create them after the transfer, they will be transferred to your Onlinenic account, after the domain; it just takes some time (as I have wrote - usually 1-2 weeks AFTER successful transfer).
By 'update' I mean 'update IPs', sorry if I have put that not clear enough.
I would suggest you to update (if they needs updating) your nameververs and transfer only then, as child DNSes are transferred sometimes 1-2 weeks after the domain.