Changing DNS host records

[Matthew Crocker <matthew () corp crocker com>]

Hello

It has been over a decade since I’ve done this and need some help refreshing my memory.

I have many customers that have registered their domains against my authoritative servers (DNS-AUTH3.CROCKER.COM).    I 
need to move that machine to a different network/IP address.    I’ve made the updates in my domain (crocker.com) but I 
think I also need to update the host glue records in the gtld-servers as well.   How do I go about doing that?   
Ultimately the customers need to update their registration with our new authoritative servers, many have but we still 
have some stragglers I don’t want to break when I shutdown the old servers.

Thanks

-Matt