Who called from 2158952000

Drextel university is the culprit behind this number.

This is the phone number for Drexel University.  All calls from the University that go to outside numbers will display 215-895-2000.  You could be receiving a call regarding an event reminder, status of your application, or anything else related to this University.  If you are a current student, or recently accepted to go to this school - answer the phone.  Drexel will leave you a voicemail if it was something important (unless your voicemail is full or your phone rings for more than a minute)

Source: current student and work in the admissions

There is absolutely no reason why they should be calling me, unless they dialed a wrong number.  I was called twice, withing 4 minutes, on 8/11/15.

I received a call from this number but couldn't answer. They didn't leave a message, but I think it was Drexel University.

Typically Drexel University's admission/enrollment team. This is the main switchboard though so any Drexel University number will route through this.