When I block a number, will the blocked number know that they have been blocked? October 21, 2015 22:33 Updated Follow When a blocked number attempts to call you, they do not receive any notification that indicates they have been blocked Related articles What does the blocked caller hear when they are blocked? How do I block Restricted, Private, Unknown, or Anonymous calls? How do I lookup a number? How do I clear all items from my Activity List? name iD Service