Adobe Flash Professional CS6 is and no longer available for purchase directly from Adobe. Serial numbers for this version were perpetual licenses, meaning they were intended to work forever on the original machines they were registered to.
As Adobe Flash Professional CS6 is no longer supported, you might want to consider alternative software solutions, such as: adobe flash professional cs6 serial number
Key details regarding Flash Professional CS6 serial numbers and activation include: permanently discontinued Adobe Flash Professional CS6 is and