Just curious, this may be a silly question, but since NBC is my all time favorite television network (I like ABC, CBS, FOX, and the other television networks, but NBC is my favorite), are there any NBC television affiliates (besides WNBC in New York City, KNBC in Los Angeles, and WMAQ in Chicago, since they're owned and operated by NBC) that have never pre-empted any NBC network television show, daytime, evening, and nighttime (except for special events, breaking news, special reports, etc.), and the NBC shows have aired in its exact time slot without moving to a much later timeslot a half-hour, an hour, or more than an hour later?

The reason I ask is because I read that WDIV in Detroit didn't air "Late Night With David Letterman" and "Late Night with Conan O'Brien" in the 1980's and 1990's, and WMAR in Baltimore (when it was an NBC television affiliate before it became an ABC affiliate) didn't air Johnny Carson's "Tonight Show" in the 1980's, and WPCQ (now WCNC) didn't air NBC Nightly News with Tom Brokaw in the 1980's (from circa 1982 to 1985, I think), and I also read that my NBC affiliate in St. Louis, KSDK, pre-empted some (not all, but some) NBC daytime television shows and those NBC Daytime shows aired on ABC affiliate KDNL also in the 1980's (when KDNL was an independent station), like with me being a huge game show fan, "The Match Game-Hollywood Squares Hour" with hosts Gene Rayburn and Jon Bauman, from 1983 to 1984

And KPRC in Houston didn't air "Late Night with Conan O'Brien" until 2:40 AM.
Thanks!

Sean