By Domicile:
ATL: 350, 330, 765, 7ER, 73N, 320, 717
DTW: 350, 330, 73N, 320, 717
LAX: 350, 7ER, 73N, 320
MSP: 330, 73N, 320
NYC: 330, 765, 7ER, 73N, 320, 220
SEA: 330, 7ER*, 73N, 320, 220
SLC: 73N, 320, 220

By Fleet:
A350: ATL, DTW, LAX
A330: ATL, DTW, MSP, NYC, SEA
B767-400 (765): ATL, NYC
B767/757 (7ER): ATL, LAX, NYC, SEA*
B737: ATL, DTW, LAX, MSP, NYC, SEA, SLC
A320: ATL, DTW, LAX, MSP, NYC, SEA, SLC
A220: NYC, SEA, SLC
B717: ATL, DTW

*SEA7ER is shrinking with attrition, likely closing before too long.
Future categories of SLC330 and BOS320 have been hinted at.