Definition of have someone's number on it in English:

have someone's number on it

phrase

informal
  • (of a bomb, bullet, or other missile) destined to find a specified person as its target.

    • ‘As a batsman or an umpire a ball always has your number on it and if I made a mistake, so be it.’
    • ‘You just didn't know whether the next bullet or shell had your number on it.’