Who called from 6503959902

Just called a few minutes ago, left a voicemail wanting to install some kind of system.

Got a call, no voicemail.

called didnt leave a voice mail

Called at 6am local time. left no message, called back and got that the number wasn;t a working one. I'm assuming it's a scam

Got a call from three different numbers.... same exact thing; First Alert alarm system at little of no cost... blah blah blah.

The other numbers are:  432 201 5724 and 559 366 2440.