Unfortunately, there’s no one-size-fits-all answer to your question. There are an estimated 4,000 data brokers operating around the world. These data brokers are varying levels of shadowy and although a quick web search for your name will reveal many of them, most prefer to stay behind the scenes. To narrow down the search for those data brokers that have your data but aren’t advertising the fact online, research data brokers known to operate in your area. This will leave you with a short(er) list that you can work through, sending opt-out requests blind. Or try a subscription to Incogni. We send out dozens of data removal requests at a time and deal with any follow-up interactions with data brokers on your behalf.