Where is my Reason Limited ID number? Fredrik March 21, 2018 15:36 Follow If you have purchased a POD Studio™ GX, UX1, or UX2, please visit the below URL to retrieve your Registration ID from Line 6: http://line6.com/propellerheadcode/ Comments 0 comments Article is closed for comments. Related articles I've lost my license number. What do I do? When I try to register, I get a reply saying my serial number is already in use?