As of May 5th, 2018, the following stations have signed off:
WHNW-LD Gary, IN (RF 18)
WAAA-LP on RF 49 signed off years ago.
If W46EB was ever on, they're off the air.
WOCH-CD (RF 49)
WYCC Chicago (RF 21) This station is now channel sharing with WTTW on RF 47 (still maps to 20.1, & affiliates with Mhz Worldview)
WBBM-LD (RF 26) They shut it off, after getting better coverage on WMEU-CD on RF 32, by leasing bandwidth on this station (Mapped to 48.3 for CBS)
WSNS (RF 45) Now channel sharing with WMAQ-TV on RF 29 (still maps to 44.1 & 44.2)
WRJK-LD (RF 24) This station stopped broadcasting in analog 3 years ago, & maps to 22.1 on digital)
W25DW-D is still on for now, but they're still broadcasting on RF 25, not RF 22, & maps to 25.1.
WXFT-DT maps to 60.1 (RF 44, which shares with WLS-TV)
Minor revisions in mapped channels & any network affiliation
WWME-CD maps to 23.1 (RF 39) (network MeTV)
WDCI-LD RF 30 maps to 57.1 (network Daystar)
WEDE-CD RF 34 maps to RF 34
WCHU-LD RF 33 maps to 61.1
WOCK-CD RF 4 maps to 13.1
WMEU-CD RF 32 maps to 48.1 (Independent) (Note: as previously listed, WBBM-LD, the translator now uses bandwidth on this station, & CBS maps to 48.3, but RF 12 is still on the air with no changes).
WESV-LD RF 40 maps to 40.1
WGN-TV RF 19 only change is that WGN-TV went back to being an Independent station September 2016. The CW affiliation went to WPWR-TV, & operates as a dual affiliation on 50.1.