The Testbeds Focus Group developed detailed test plans covering four priority areas, with an initial testing focus on validating the STIR/SHAKEN protocol to sign and verify calling number to combat illegitimate caller-ID spoofing. They have completed efforts on the test plans for Distributed Service Bureau Number Assignment, Just-in-Time Number Assignment using Existing Systems; and Routing (IP-LERG and IP Toll Free). A full report of these testing activities and results has been published: Testbeds Focus Group – Test Plans and Observed Results. These priority test cases were gathered through the focus group’s initial publication of Testbeds Landscape Team – Assessment and Next Steps, Version 2.