These calls happen once or twice a day, with no caller ID other than "Out of area." A reverse check indicates these 937-401-xxxx calls are from a Florida-based communications company -- Intermedia Communications, Inc -- expanding into the Midwest USA area. Their strategy clearly indicates consumers should have little faith in their business strategy of not identifying themselves, etc., and their robocalling is crap.
These people call all the time with bogus calls. They never leave a message on the answering device, either. It's a good idea not to answer their calls, and block them if you can.