The FCC has created a Robocall Mitigation Database, which requires all voice service providers to file certifications providing detailed information regarding their implementation of the STIR/SHAKEN caller ID authentication framework and/or a robocall mitigation program.
The Cloud Communications Alliance has posted "Robocalling-What you need to do" and "Robocalling-Mitigation instructions" in the CCA Members' portal. To access the information, CCA members can go sign into the members' portal and selection Documents Resources/Stir Shaken Resources/Robocalling Mitigation.