Receive calls from this number, every couple of days.  Caller ID displays CSI.

What you make you think it was a college?  CSI = Crime Scene Investigation.  Probably many other things too.

A human called from this number, Caller ID did say "CSI".  She said they wanted me to take a brief survey--not sure on what as I said no thanks and hung up.

I have call block on my phone but out of curiosity I answer once when there is a new number before I block it. Why are so many of these spoof calls just silence for a few seconds and then a busy signal? If they are going to call why don't they at least try to pitch their scam? I sometimes enjoy giving them an obscenity laden tirade and see how long it takes them to hang up. The ID on this said CSI. Is that supposed to scare me into thinking I am a suspect in an investigation? A few clicks and it is now on my blocked list.

Caller ID:CSI
CSI could represent several different entities from an academic honors society, colleges. companies, to construction related/engineering education programs or tv shows.  Who knows.  Thanks for the information regarding the "google" voicemail message.  They call daily around the same time, so far.  I will continue to ignore the all