Spokeo is, perhaps, the simplest. You just find your profile page on the site, go to spokeo.com/optout, and then type (or paste) the link along with your email address so you can confirm.
Others are not as straightforward. At Whitepages, you have to paste the URL to your profile at whitepages.com/suppression_requests, and then type the reason you want to opt-out. After that, you have to provide your phone number—yes, you have to give a data broker your phone number. You then receive a call from a robot, which gives you a verification code you have to type on the website to complete the process.
The ultimate indignity? 411.info actually charges a fee if you want it to remove your info. more
