I also got a hang up call from this bank, reading that it was from Associated Bank. That is my bank but I think it's unlikely they would call after business hours and hang up. 8/24/16
Called 6/28/2016 at 6:15PM. Caller ID said "Associated Bank". That's our bank so picked up, no answer. No way they call after 6 PM. After checking, Associated Bank has no locations near 313 area code - Detroit Michigan