One of my favorite station IDs was an independent local analog UHF channel 56 with call letters WLVI. I heard those letters for years before I realized it was 56 in Roman numerals.
You can think of it as the "smash like and subscribe" of the radio days!
TV stations are allowed to do it visually. When I was young it was common to see it as a full screen ID in between shows (often with a quick weather report, “time and temperature”). Later most stations I saw quit that and just put it as a bug at the bottom of the screen over top of the show.
Bangor, ME has an ABC affiliate WVII broadcasting on VHF channel 7.
"KCMO (710 kHz) is a commercial AM radio station licensed to Kansas City, Missouri ..."
It must be weird to live near the Mississippi and get a mix of K and W station call signs!
As for why K and W, nobody is sure why those two letters, but it might be related to Morse code.
https://en.wikipedia.org/wiki/Call_signs_in_the_United_State...
KOME:
https://www.youtube.com/shorts/rMhtoniG82o
(I wish I could find a recording of the one that went;: "Don't touch that dial!!! You've got KOME on your radio." or "The KOME spot on your FM dial.")
Vintage WWDC:
WRC-TV - NBC Washington
similar to...
KIAD - Dulles International