The number given is typically the OMIC (Operations Manager In-Charge), they man the desk in charge of the whole facility at any given time. They are Area Managers who rotate through. The supervisor (FLM), will fill them in on what happened, and they will typically just discuss what happened, how to avoid it in the future, and gather any other information. The controller rarely actually talks to the pilots who are told to call. If needed the controller will have filled out a statement, for a pilot deviation or incident, this way the OMIC has the controllers side of the story. At a tower it will likely just go to the supervisor.