US air strikes have helped push back IS in the town near the Turkish border.
Correspondents say the airdrops are likely to anger key US ally Turkey.
The drops of supplies provided by Kurdish authorities in Iraq were "intended to enable continued resistance against Isil`s attempts to overtake Kobane," CentCom said in a statement. IS is also referred to as Isil and Isis.
All the aircraft involved had returned safely, it added.
More about:
