https://www.reuters.com/article/us-usa-robocalls/u-s-state-legal-chiefs-telecom-firms-set-to-crack-down-on-robocalls-idUSKCN1VC24F

Attorneys general from 50 U.S. states and the District of Columbia will announce on Thursday they are joining forces with major telecommunications providers, including AT&T Inc, Verizon Communications Inc, Comcast Corp, Sprint Corp and T-Mobile Us Inc, to crack down on unwanted robocalls, according to a document seen by Reuters.