I see that the earlier entries on this forum are all from 2015 or earlier.  Well, this number is still in active use, because I am getting calls from it and other related numbers every day.  My former in-laws are also getting them, trying to reach me.  I would actually take the calls and find out what is going on, but every time I answer, there's no one there.  I can block the numbers, but that's no help to my in-laws, who are receiving them on a landline phone and can't block them as easily.