Who called from 4242697381

This number repeatedly calls and no one answers when I pick up.  They call 4 or 5 times a day.

The caller ID said "Hawthorne CA" . I didn't answer and no message was left. When I called the number back, the automated voice said 'Sirius'. I just bought a vehicle and got a free 90-day subscription but don't know why they'd call and not leave a message.