All the expeditions, Except Alligator and Boussole, which were added most recently, are included in ICOADS release 3. (Though the observations included are not exactly the same - ICOADS applies some of its own data filtering and quality control.)
All the expeditions (including Alligator and Boussole) are included in the ICOADS3+ dataset and so in the forthcoming version 3 of the Twentieth Century Reanalysis.