In this day and age is it still possible to make anonymous phone calls? With the advent of caller identification on most phones, at the very least, one’s phone number is typically known to the person he is calling. However, through the use of blocking one’s number or using an anonymous flip phone, it is still possible to remain anonymous when calling another person. Further, it could be argued that simply knowing someone’s phone number does not give you any identifying information about that person. This particular issue of how to handle anonymous tips given to the police was debated on January 21, 2014 and will be decided by the United States Supreme Court through the case Navarette v. California.