Male voice looking for husbands ex-wife

Person stated they were looking for someone i knew but am not associated with. Claimed my number was a number given as contact for him. They wanted information but i would not give them any. They keep calling

Most likely someone needed a fake phone number and gave them yours.  If I'm right you can expect more calls and may need to start blocking numbers.

That happened to me.  My pests were looking for Michael the Deadbeat.