Iheart owns KGB-FM 101.5 which has held those call letters for decades so
they are allowed to bring them back on AM.

From radioinsight.com, the 760 KGB program schedule:

Full Programming Lineup:
3 a.m. – 4 a.m. First Light
4 a.m. – 6a.m. America in the Morning
6 a.m. – 10 a.m. Armstrong & Getty
10 a.m. – 12 p.m. The Mark Larson Show
12 p.m. – 3 p.m. The Mike Slater Show
3 p.m. – 6 p.m. The Buck Sexton Show
6 p.m. – 10 p.m. The Mark Levin Show
10 p.m. – 3 a.m. Red Eye Radio

https://radioinsight.com/headlines/190053/760-kfmb-san-diego-changes-call-letters-to-kgb/?fbclid=IwAR1xWBKngO22eG_x4plm-nRpc1ZiylYfgcMYh68WGiBWN8qsMD5VeIrnKL8
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