Here's the phone at my dorm. Accepts incoming calls: 402-435-9580
The sticker on the handset reads:
DO NOT DISCUSS CLASSIFIED INFORMATION.
THIS TELEPHONE IS SUBJECT TO MONITORING AT ALL TIMES. USE OF THIS TELEPHONE CONSTITUTES CONSENT TO MONITORING.
DD FORM 2056, DEC 85 
The dorms are opening up again for the fall, so there should be some people in that area.
