They called yesterday. Name showed up as "WEB SERVER CO". I didn't answer, but based on that name I would assume it's one of those tech support scams (don't quote me on that).
Another work interruption - caller ID said "Chicago Public". Didn't answer a call where the caller ID changes by day. No message left - blocking number.
The call came at 6:24 pm, 4/7/17. Caller id said: Chicago Public. I answered the call with "hello." A recording came on and said something about discount electricity ... at that, I just hung up the phone.