adnxs.com operates primarily as a cloud infrastructure provider, focusing on ad tech & programmatic advertising. adnxs.com is the core technical domain used by Xandr (formerly AppNexus) for real-time bidding, ad serving, and user tracking. It functions as the infrastructure for one of the world's largest digital advertising exchanges. It is operated by Xandr, a subsidiary of Microsoft Corporation.
Beyond its core function, the ecosystem extends into marketplaces, providing a broader range of services.