This website is great for people who want to check a number to see if it's spam and needs to be blocked.
If you answer a spam call to tell an organization to quit calling you, they will know they have made contact with a real person. A spam caller will probably ignore your request, plus they can now sell your 'responsive' number to other spam callers. If in doubt about a call, you can check this website to see if others have received spam calls from the same number and then block the number, if needed. Do not answer a call if you don't recognize the number or caller. Family and friends can leave a message, and then you can call them back. It's easy to block a number on a mobile phone. If you have caller ID, you can purchase a devise that makes it easy to block spam callers on a land line. We have blocked over 400 spam calls on our home phone.