Received a call, no one on the line. Left no message

This is a number that calls either claiming you won a free cruise to the Bahamas or something about your credit card. Either way, I think it's just a phishing scheme to get your information. I have set it to my auto-reject list and it still calls a few times a week. I am on the Do Not Call list and that doesn't seem to matter.

Someone at this number repeatedly calls my mother. She does not answer because she does not recognize the number. I told her to continue disregarding the call.

Nothing to add, ID. said Medical Claims Department, left no message.

Called, no message