I have received calls from this number (and others from the same area code and prefix but with slightly different last 4 digits) and they do not leave a message.  I don't answer calls that I don't recognize so I have no idea what this is about.  They have called off and on for the last few months.  Latest call was 11-26-16 at 2:30pm from 281-829-4352.  Previous was 11-03-16 at 7:00pm and was from 281-829-4323.  Caller ID shows the calls coming from Katy, TX.