There isn't a precise or precise way to tell whether your number has been blocked. But noticing some common signs will help you determine whether the number you are calling is blocking. Sometimes, you won't be able to tell that your message is being sent, then the first step will be to phone the person to check the tone on the dial. When we call normally it is possible to hear several rings before voicemail will appear. However, in blocked cases, within a couple of rings, you'll be in a position to hear messages from the voice.