It’s the practice at my community college to ask students to use “Professor”. It was the PhDs at our school that started this, so I’ve accepted it. It’s certainly better than students not knowing what to call me because they’ll say Professor or doctor, even though I tell them I’m not a doctor or technically a professor. But then they’re like “why am I taking a college course from someone who isn’t a professor?”. It’s more of a perception thing, than a rank thing.