So, to wrap this up...
The agreement between CBS and Entercom/Audacy (and in Boston, with spinoff partners iHeart and Beasley) on the use of shared call letters covers/covered the following radio stations, whose call signs are also used by CBS-owned television stations:
- WJZ and WJZ-FM Baltimore
- WBZ (iHeart) and WBZ-FM (Beasley) Boston
- WBBM and WBBM-FM Chicago
- WWJ Detroit
- KCBS-FM Los Angeles
- WCCO Minneapolis
WCBS and WCBS-FM New York
- KYW Philadelphia
- KDKA and KDKA-FM Pittsburgh
- KCBS San Francisco
Provided the stations don't change format (WCBS --> WHSQ) or are sold, they can keep using the call signs indefinitely–except in NYC, LA and SF, where they can be used for 20 years after the sale (renewals are possible). The clock is ticking, with 13 more years to go for WCBS-FM, KCBS and KCBS-FM.
In comparison, the pact Cumulus inherited between Disney/ABC and Citadel allows the shared ABC radio/TV calls to stay on radio, apparently in perpetuity. WABC kept its call sign after Cumulus sold it. KGO survived after the format change to sports betting. But with the move of KSFO's programs (and perhaps call letters) to 810, we'll see what the future holds for the KGO calls on A