On which border are these cities?
Bi'ur ha'Gra: They are on the northern border of Naftoli, from the border of Asher 1 until the Yarden.
Malbim: The eastern borders of Yosef and Yisachar came close to the Yarden, but not all the way to the Yarden. Binyamin's border went to the Yarden only by Yericho. The rest of the Yarden was Naftoli's eastern border. These cities were the western border.
Asher was west of Naftoli. (PF)