The Electronic Frontier Foundation (EFF) and a nonprofit privacy rights group have called on several states to investigate why "hundreds" of data brokers haven't registered with state consumer protection agencies in accordance with local laws. An analysis done in collaboration with Privacy Rights Clearinghouse (PRC) found that many data brokers have failed to register in all of the four states with laws that require it, preventing consumers in some states from learning what kinds of information these brokers collect and how to opt out. Data brokers are companies that collect and sell troves of personal information about people, including their names, addresses, phone numbers, financial information, and more. Consumers have little control over this information, posing serious privacy concerns, and attempts to address these concerns at a federal level have mostly failed. Four states " California, Texas, Oregon, and Vermont " do attempt to regulate these companies by requiring them to register with consumer protection agencies and share details about what kind of data they collect. In letters to the states' attorneys general, the EFF and PRC say they "uncovered a troubling pattern" after scraping data broker registries. They found that many data brokers didn't consistently register their businesses across all four states. The number of data brokers that appeared on one registry but not another includes 524 in Texas, 475 in Oregon, 309 in Vermont, and 291 in California.