Who called from 6237451808

Called me on my cell phone, which is on the do not call list.  I didn't answer it.  No message left.

Called my cell today. Ignored the call and no message was left. It's an AZ zip code.

Called my cell phone, I did not answer because I didn't recognize number, no message was left.

Accidently answered as I thought it was an expected call. I looked, I didn't recognize the number and hang up.

Never answered because it's a collection