Who called from 2132059099

I keep getting calls, from Los Angeles, an Asian language speaker, most likely Chinese keeps calling me.  When the I block the number, the same type of voice/ language calls again under a slightly different number.  They are all recordings.
Also 213-205-2232

Called Chicago-area cell 6/12/14: left no message.

These numbers are coming from the US mobility wireless... It looks like that they are doing what called war dialing that they scam your phone for a modem