I received a call from this number also.  Nice gentleman.  Brown County Sheriff's Dept. fundraiser.

My wife received a call from a man calling from 901-2519.  He asked for me by my first name, but I was asleep.  When my wife stated I was asleep and asked if she could take a message, he said he would call back later.  She said he did not have a pleasant manner about him.  No name came up in the caller I.D., but the number did.  I called (920) 901-2519 just out of curiosity.  It rang 3 or 4 times and then started beeping like it was dialing.  After about 6 or 7 beeps I hung up suspecting it may have been a scam of some sort.  It's about 4 hours later and they haven't called back...