Federal Communications Commission: Progress Protecting Consumers from Illegal Robocalls [August 12, 2019] [open pdf - 396KB]
From the Document: "Robocalls are the top complaint received by the Federal Communications Commission (FCC) and a consistent congressional concern. In 2016, the FCC received 150,000 robocall-related complaints; in 2018, it received 232,000. [...] The FCC and the telecommunications industry have both taken steps to counter illegal robocalls. The telecommunications industry has developed new technologies and other tools to detect and block illegal robocalls. The FCC has taken steps to create a policy environment in which those tools can be implemented. The FCC has also expanded the scope of some existing rules and continues to target and fine illegal robocallers. The following provides a brief overview of the steps taken."
CRS In Focus, IF11290
Congressional Research Service: https://crsreports.congress.gov/