Excuse me, where is this mobile phone number?

Let me answer

It seems that the original poster has never used an Internet phone call

This was called by someone else using an Internet phone call. The Internet phone call came to your mobile phone. On the phone, the number displayed is random and different every time. If you call back, you will be prompted that the number you dialed is empty. For example, skype, uucall, etc., you can try it.

It’s time to give me extra points!