This is a university of delaware number. They own all of 302-831-xxxx. However, it's not a dorm number because those are 302-837-xxxx. It's likely the office of annual giving.
I have gotten calls from borh 302-831-4482 and 4858. I have missed the calls both times, and they have left no message, but when I called back immediately, it said they number was not in service. Now that I try back a day later, it rings once and then goes silent, but does not disconnect the call.
Just got a call from the 4858 number; they left no message. I typed the phone number into Google, and apparently it's a computer science professor's fax number? So weird.