[db-wg] Identifying IX space in the database

Hey everybody! I was wondering if it was possible to tell if an inetnum or inet6num was assigned for the purpose of an internet exchange. Looking at the inetnum objects for 185.1.0.0/16 (that seems to now be depleted) it does not seem there is anything different between a IX allocation and a regular allocation, in either the delegate file or the actual DB. Anyone know any better? Ben