The main reasons for receiving so many spam calls include data leaks where companies' user information is breached and sold to scammers, your phone number being exposed publicly such as on social media or people search sites, answering spam calls in the past which signals that your number is active, and data brokers selling your phone number in bulk to marketers and scammers. Additionally, some spam calls may also come from automated robocall systems targeting large volumes of numbers. These spam calls may be telemarketing, fraud attempts, or scams aiming to collect personal info or money. The exposure of your phone number on the dark web or in data breaches makes you an ongoing target, as scammers buy this information to reach potential victims. To reduce spam calls, it is advised to avoid answering unknown calls, register your phone number with do-not-call lists, use carrier or third-party spam- blocking tools, limit your phone number's public visibility, and consider data removal services to reduce your personal information circulation among data brokers.