Caller ID appears to be they are from OU...but... The number is unlisted and seems to be located in OKC. The number does not show up when searching the OU website for valid phone numbers.
I get calls daily from 405-325-7896. I answer and there is never anyone on the other end. My caller ID says "Unknown." I see that others report a caller ID of "University of Oklahoma." I am a graduate of the University of Oklahoma so this might be calls seeking contributions. However, incessant calls with, never anyone on the other end, is VERY annoying.