Stations that have been shut down
AM
560 KZAC San Francisco, CA (5kW day / 5kW night)
920 WYMB Manning, SC (2.3kW day / 1kW night)
1050 WAYS Conway, SC (5kW day / 0.473kW night) + FM translator 101.9 W270BZ
1070 WAPI Birmingham, AL (50kW day / 5kW night)
1160 WJLK Lakewood Township, NJ (5kW day / 8.9kW night) + FM translator 104.1 W281CK
1170 KBOB Davenport, IA (1kW day / 1kW night) + FM translator 104.1 K281DB
1230 WSSO Starkville, MS (1kW day / 1kW night)
1240 KLIK Jefferson City, MO (1kW day / 1kW night) + FM translator 103.5 K278CT
1260 WRIE Erie, PA (5kW day / 5kW night) [FM translator 96.3 W242CU stays on being fed by another Cumulus station]
1280 KSLI Abilene, TX (0.5kW day / 0.226kW night)
1310 WOBM Asbury Park, NJ (2.5kW day / 1kW night) + FM translator 96.7 W244EE
1340 KRMD Shreveport, LA (0.4kW day / 0.4kW night) [FM translator 100.7 K264AS stays on being fed by another Cumulus station]
1400 WJZN Augusta, ME (1kW day / 1kW night) + FM translator 95.9 W240DH
1440 KPUR Amarillo, TX (5kW day / 1kW night)
1440 WLWI Montgomery, AL (5kW day / 1kW night)
1490 WLAW Whitehall, MI (1kW day / 1kW night) + FM translator 99.1 W256DM
1450 KIKR Beaumont, TX (1kW day / 1kW night)
1510 KBED Nederland, TX (5kW day only)
1560 WLZR Melbourne, FL (5kW day only) + FM translator 107.9 W300DL
FM
93.7 WJBC Pontiac, IL (12kW ERP / 144m HAAT; Class B1)
94.9 KOLI Electra, TX (50kW ERP / 150m HAAT; Class C2)
97.5 KJMO Linn, MO (6kW ERP / 99m HAAT; Class A) [didn't Cumulus previously turn an FM license in in the Jefferson City area several years back?]
97.5 WLAW Whitehall, MI (6kW ERP / 99m HAAT; Class A) [Cumulus just built a new tower site for this station within the last couple of years as it had to move to allow third-adjacent sister station 96.9 WLAV to relocate its broadcasting location from near Cannonsburg to Allendale]
101.5 WLXX Richmond, KY (9kW ERP / 165m HAAT; Class C3)
I wonder if a few of the AMs being taken off have had the land where the towers stand placed on the market.
Side note: I would allow translators that were permanently tied to an AM to separate from the AM after five years and rebroadcast a different AM station, an FM station, or an HD2/3/4 subchannel.