Bogus phone call of the day - 866-325-2373

I just recieved a hang-up call from 866-325-2373. This is the second time they have called, they did not leave a voice mail and they hung up when I answered. Google
Search results in a series of hits on the Free Republic Web site.

One possibility is that they are using some sort of auto dialer and they simply drop calls placed if there is no-one to handle the call.