Washington Post: For the first time since 2013, ISIS has no border with NATO

Independent: Isis 'cut off from rest of world' as rebels expel Islamists from Turkish border

From the last one:

Isis has lost control of its last territories on the border with Turkey, monitoring groups say, in a major blow to the group's ability to receive foreign fighters from the rest of the world.

Neither is ISIS cut of from the world, nor from NATO. Fighters as well as goods can still cross to and from Turkey like they did throughout the last years.

Just take a look at the map: