<p>Maybe it’s being from Seattle, but I almost always call friends’ parents by their first names and have done so for as long as I remember. With professors, I will generally use their first name unless instructed otherwise as I started my college experience in community college where the instructors were not PhDs and went by their first names. </p>
<p>I do have one professor who calls every student by their last name except for me. </p>
<p>At my first job, I didn’t know my boss’s last name until 6 months after I quit and needed it for internship applications.</p>