immediate hang up

Did not answer the call.  They left no message.

Have received two calls in last week. Did not answer call.  Left no message.

I have been receiving calls from this number for about 3 weeks now. It showed up on my caller ID. It says Texas call on it. I have tried both ways. I have let it ring and go to voice mail, but of course no  message and I have also picked it up.There is no one on the other end of the call and no dial tone.
Just got one again while home for lunch.
will not answer again.
what is this 903-189-2472?

I have been receiving calls from this number for about a week.  I have let it ring and go to voice mail, but no message is left.  Just got one now.  I tried to research who the caller is, but no luck.  Let me know if you ever find out.