>In the cloud, hyperscale computing platforms such as Microsoft Azure, Google Cloud, and Amazon Web Services all operate significant resolver infrastructure to

>In the cloud, hyperscale computing platforms such as Microsoft Azure, Google Cloud, and Amazon Web Services all operate significant resolver infrastructure to support their services. At least four of the biggest hyperscalers rely on FOSS for DNS resolving, while others have built proprietary solutions based on FOSS DNS libraries. This is surprising. I would have expected them to have custom needs with so many customers that using an off the shelf service would be sufficient.