Looking at new phone number blocks coming to carriers, T-Mobile will receive 308-206 for Kearney, Nebraska. I believe they also inherited some numbers from Sprint in that area. They did decomission the multitude of numbers Sprint had reserved in Minden, NE. That was a weird one.
I am only aware of 2 sites (really 1) in Kearney and 2 in Grand Island. Based on size, Kearney could benefit from another 2-3, as well as GI.