We need to move our Primary DNS server from legacy IP space provided by our upstreams to our ARIN Assigned IP space. I am looking for advice and any gotchas. I couldn't find any white papers to this affect or archived articles or postings. If someone does have a resource for this or find this could be valuable, I can certainly gather all the info and document it. Most of the Registrars I have seen now use the Authoritative DNS Server Host names for the domain name registrations vs the IP Address. For most of our customers, we register and host the DNS. I have confirmed almost all the customers have either Network Solutions, Tucows, Go Daddy and Register.com. Can I simply change the IP address of our DNS server and update the DNS Host Record with our registrar with the new IP and any A / NS records we have ? As long as other customers domains have our DNS Server FQDN as the Host, they should not need to make any changes, correct ? I would love to think its that simple, but there is always a gotcha. Does anyone know of any main registries using just the IP Address where the customer might need to go in and make those changes for each and every domain ? Any input, advice or ideas is appreciated. Thanks Eric