This document is a compilation of self-reported information from Federal government agencies provided in response to an Advanced Wireless Test Platforms (AWTP) Information Request by the AWTP Team co-chairs in April 2021. The AWTP Team focuses on providing a forum for interagency coordination on wireless test platforms and encourages public-private partnerships. This report complements the November 2020 Federal Mobility Group (FMG) report, Framework to Conduct 5G Testing. The FMG report compiled information about equipment (hardware and software) for existing testbeds through a survey and about visits to laboratories owned or operated by equipment vendors, mobile network operators, universities, and Federal agencies. At that time, early 2020, none of the Federal laboratories had 5G capability. The AWTP effort builds on that work but is focused on 5G and beyond infrastructure directly owned or operated by Federal Government agencies. In addition to updating the FMG study, this effort includes near-term plans, access, and data sharing elements to help facilitate coordination and collaboration.