Michigan Attorney General Launches Operation Robocall Roundup, Sends Warning Letters to 37 Telecom Companies

Michigan Attorney General Dana Nessel has launched Operation Robocall Roundup, a multistate effort to crack down on robocalls across the country. As part of the initiative, Attorney General Nessel and 50 bipartisan attorneys general are sending warning letters to 37 voice providers demanding that they act now to stop illegal robocalls being routed through their networks. These providers have not complied with Federal Communications Commission (FCC) rules about responding to government traceback requests, registering in the FCC's Robocall Mitigation Databases, or filing a plan to reduce illegal robocalls on their network. The task force is also sending letters to over 100 downstream providers that accept call traffic from the 37 companies.

Key Takeaways:

• Operation Robocall Roundup is a multistate effort led by Michigan Attorney General Dana Nessel to crack down on robocalls across the country.
• 37 voice providers have received warning letters for not complying with FCC rules on responding to government traceback requests, registering in the FCC's Robocall Mitigation Databases, or filing a plan to reduce illegal robocalls.
• The task force is also sending letters to over 100 downstream providers that accept call traffic from the 37 companies.
• The voice service providers receiving warning letters include Advantage Investors LLC, Alpha Stream, and 34 others.
• The Task Force was established in 2022 with 51 attorneys general joining forces to investigate and take legal action against companies responsible for significant volumes of illegal and fraudulent robocall traffic.
• The FCC has announced that it will be removing seven of these providers from the Robocall Mitigation Database, which means that other providers will no longer be allowed to accept and route any calls from their networks.

Statistics:

• 51 attorneys general joined forces to create the Anti-Robocall Litigation Task Force in 2022.
• 37 voice providers have received warning letters for non-compliance with FCC rules.
• Over 100 downstream providers have received letters from the task force.
• 7 providers have been announced to be removed from the Robocall Mitigation Database by the FCC.

Sources:

• [Michigan Attorney General Dana Nessel, "Attorney General Nessel Launches Operation Robocall Roundup", August 7, 2025]
• [FCC, "Removal from the Robocall Mitigation Database"]
• [Anti-Robocall Litigation Task Force, "Warning Letters to 37 Voice Providers"]