iOS 10.2 is the highest jailbreakable version on 64-bit devices except the iPhone 7/7+. The iPhone 7/7+ are only jailbreakable on iOS 10.1.1 and nothing yet for iOS 11 on any device. There are some older jailbreaks for devices on iOS 9 versions 9.0.2 or 9.3.x depending on the type of device.