Who called from 5400594744

Just called my office...left no message..540-059? What kind of number is that?  doesn't say who it is on the caller ID

Just got this, spam recorded message about old people that fall down.

I've been called on my cell phone twice in the past two days. I didn't answer, it left no voice mail.

Got this on business cell 2x this week.  Second call I opted out using 5 per instructions, will see if this actually works.

Two calls on my cell in 2 days.  No message left.