I've been getting calls from this number too. Don't know who it is, didn't bother to pick up. Guessing it's USC because 213-740-xxxx is always USC numbers... not sure why.
Got a call from this number as well. No answer. Did not attempt calling back. Thought it might have been ex-girlfriend. Not sure now after seeing this post.
hmm, that makes sense that it's usc. i've been getting those calls lately too - they must be trying to collect donations. usc: i am still paying back my loans! no extra income for donating BACK! :)