I am looking for a simple DNS name server set up to always return the same IP address no matter what the request is. The reason for this is we are a domain registrar and when a domain is first registered we need it to have valid name servers (and don't want to have to first create name server records before registering a domain). We will then subsequently change the name server records after the domain has been registered.

I assume this is possible to do with bind but was wondering if there might be a simpler solution available using one of the more light weight name servers out there? Any suggestions on how to accomplish this in a simple manner will be appreciated.