Abandoned Call...Caller ID shows: "Del Mar, CA"
Most likely scammers/criminals using a spoofed number, and ignoring the worthless DNC list...All you can do is keep blocking the area codes these scumbags call from.
You should also consider buying a phone blocking device which will block area codes and will eliminate most of these junk calls.

2 calls in 4 days, didn't answer, no msgs. CID "Del Mar, CA". Blocked. Legit call wd have a CID AND leave a msg.

I did not answer and they left no message.