On April 23 I received a phone call from (714) 551-6823. The call was phishing for credit card information. They did not identify themselves, did not use my name, and stated that they had previously sent me mail, which was false. Whoever is behind that phone number is a fraudster, spammer, and bad human being.
Postscript: on April 26 I received another spam call from (401) 490-7470. It was spam about my vehicle warranty expiring, which of course is a nonsense phishing attempt. The recording was nonspecific, which is a great tip that it is spam.