Some states have required that job postings must include a pay range for the job in question, so since the company won’t post the range, they refuse to hire in those states.

Not a lawyer, but this sounds shady as hell. Also probably not illegal, since they are specifically avoiding the places where it IS illegal.

There are all sorts of (backwards, ignorant) reasons why they may not want to disclose the pay rate, but it immediately puts me into the worst assumption that it’s some sort of bait and switch scam. They can “unofficially” tell you what some people make, or what the mean earnings are (inflated due to a few high earners), to get you in the door, but most people won’t touch that. Like MLM job where you’re responsible for getting your own business. Or where you get a minimum wage base salary and a few people get huge commissions, but most barely scrape by.