Dataline is a registered data broker that runs a self-service "Privacy Portal" / "Do Not Sell My Personal Information" page, which it designates as the opt-out route for all consumers (California residents can also email privacy.officer@datalinedata.com or call 888-990-3399). The exact portal URL is only a link label in the policy text, so start from the privacy policy page and follow the "Do Not Sell My Personal Information" link. Dataline says it treats opt-outs as deletion requests and deletes all records tied to a household, and it will verify your identity (e.g., confirming an email or home address) before acting on access/deletion requests; its reported median response time was 10 days.