I just moved into a new house last month which has a few apple trees and a pear tree. On three of the apple trees, there is various levels of black, peeling bark on some of the limbs. I've removed three limbs which were completed dead and rotted, but some limbs are still alive. These limbs have a serious amount of decayed bark. It appears to be girdling the limbs. So I'm worried I will lose the whole tree or a large limb. I'm new to apple trees so trying to figure out the best course of action.

A quick search yielded fire blight and black rot, but this looks slightly different. I can take more close-ups but basically the bark is dark and peeling off of the tree.