Who called from 5134686363

I have multiple calls from this and similar numbers. I have answered a couple of times but have not been able to decipher just what they'really selling. They do ask if I can hear them ok, and I respond, what?:-)
Numbers showing up include: 513.468.6337, 6338,6347, 6352, 6353, 6354, 6356, 6358, 6362, 6363, 6369. How many numbers can they have? I keep blocking them, but they call through on a new  number. It is ridiculous.

They keep on harrasing my phone calling from all different types of 468 numbers its irritating

Repeatedly calling my phone multiple times per day, block one number and they call from a different number

I too am getting multiple daily calls from 513-468-63xx. I block each one but the calls continue from very similar numbers. So frustrating!!