If you're a resident of Washington State, withholding salary ranges is against the law [0][1] in many cases. Potential employees can file a civil suit, otherwise the State will take up the case.
[0]https://lni.wa.gov/forms-publications/F700-225-000.pdf
[1]https://app.leg.wa.gov/RCW/default.aspx?cite=49.58.110