There are a couple of tools that let you mirror records to different providers, via provider-specific APIs. But a general purpose implementation would be hard.

There are a couple of tools that let you mirror records to different providers, via provider-specific APIs. But a general purpose implementation would be hard. I wrote a system which stores DNS records in text-files, and when git pushes occurs updates Amazon Route53 with their contents - At one point I was considering mirroring records to another DNS provider or two, to remove lock-in, but it seemed like my customers didn't mind. https://dns-api.com/ https://dns-api.com/