Who called from 7275542221

Does not leave a message. I believe a telemarketer

I had a missed call from this number just now. I tried calling it back and it just rang busy.

Called Thu 5-7 9:50a mst.  Did not answer.  No message

Called mobile, no message left. Reverse lookup gives "invalid number", which means this is a spoofed Caller ID, and a scam artist trying to find victims.

Did a pickup/hangup so that it wouldn't register as active number. Looked up number and the exchange is invalid, so anything coming from 727-554 is scam material. Blocking entire exchange.