All CBOT interest rate contracts were migrated to the Globex on January 27, 2008. http://www.cmegroup.com/resources-for/files/CC038_Migrationdoc.pdf The CME still charges a separate data fee for CBOT products.
More to the point when will CME drop Ecbot Symbols? http://www.interactivebrokers.co.uk...te=IB&conid=49639325&detlev=2&sess=1242680808