We may not be aware of this but everyone can be controlled through their mobile phone. All the credit goes to science and the new technologies of information applied in modern society, and even governmental entities can know where you are at any moment through a cell phone number but the answer to the question about track phone by number is yes, you can. Here, we need to mention that it depends upon the tool that you would use, whether it will work with the internet or it can provide location detail without internet access. The reason is that some of these applications need internet access to work online.