Issue Briefs State and Federal Laws Regarding Telemarketing (20-25) Subject: Telecommunications & Information Technology Published: November 6, 2020 Agency: Legislative Council Staff This issue brief provides information about how to register a number on the Colorado and federal no‑call lists; an overview of Colorado's regulation and enforcement of telemarketers; an explanation of which calls are not subject to telemarketing laws; and a summary of federal provisions regarding telemarketing. View Document