We don’t know that the records are still in the database. This could be a matter of ON DELETE CASCADE followed by a delete of what looked like innocent data and

We don’t know that the records are still in the database. This could be a matter of ON DELETE CASCADE followed by a delete of what looked like innocent data and then boom it’s all gone. Then the integration updates bind which helpfully erases all records and then once there are no domain names to talk to everything is down. I would be looking at the Internet Archive and Whois too figure out some basic domains and what the registrars are and go from there but of course depends on what business they are in and what their domain names were doing.