On January 28, 2019, FCC Commissioner Jessica Rosenworcel made public letters from 14 telephone service providers in response to her request for information concerning tools that the providers make available to consumers to block illegal robocalls, including whether such tools are free of charge. In the letters, service providers outlined a variety of mechanisms that are or will be available to either block or allow consumers to screen calls. They also highlighted ongoing industry-led initiatives to further address the issue of illegal robocalls, including the SHAKEN/STIR authentication framework.

Responses were submitted by AT&T, Inc., Bandwidth, Inc., CenturyLink, Inc., Charter Communications, Inc., Comcast Corp., Cox Communications, Inc., Frontier Communications Corp., Google LLC, Sprint Corp., T-Mobile US, Inc., TDS Telecommunications Corp., United States Cellular Corp., Verizon Communications, Inc., and Vonage Holdings Corp.

Copies of the letters and Commissioner Rosenworcel’s statement accompanying their release are available here.