Source: 1980 Broadcasting Yearbook
2 - News/Weather
3 - Reserved for Pay TV
4 - WTTV (IND 4 Bloomington)
5 - WTIU (PBS 30 Bloomington)
6 - WRTV (ABC 6 Indianapolis)
7 - WKRC (ABC 12 Cincinnati)
8 - WISH (CBS 8 Indianapolis)
9 - WGN (IND 9 Chicago)
10 - WFYI (PBS 20 Indianapolis)
11 - WHMB (IND 40 Indianapolis)
12 - WCPO (CBS 9 Cincinnati)
13 - WTHR (NBC 13 Indianapolis)
14/A - WDTN (NBC 2 Dayton)
15/B - WPTD (PBS 16 Kettering)
16/C - WHAS (CBS 11 Louisville)
17/D - WDRB (IND 41 Louisville)
18/E - WCET (PBS 48 Cincinnati)
19/F - WLKY (ABC 32 Louisville)
20/G - WIPB (PBS 49 Muncie)
21/H - WAVE (NBC 3 Louisville)
22/I - WTBS (IND 17 Atlanta)
23/J - WKEF (ABC 22 Dayton)
24/K - WLWT (NBC 5 Cincinnati)
25/L - WPTO (PBS 14 Oxford)
26/M - WHIO (CBS 7 Dayton)
27/N - WXIX (IND 19 Newport)
28/O - WKON (PBS 52 Owenton) [KET]
Four of each Big Three network, which came in very handy during the numerous pre-emptions during this era (and for CBS and NBC, more NFL games!)
2 - News/Weather
3 - Reserved for Pay TV
4 - WTTV (IND 4 Bloomington)
5 - WTIU (PBS 30 Bloomington)
6 - WRTV (ABC 6 Indianapolis)
7 - WKRC (ABC 12 Cincinnati)
8 - WISH (CBS 8 Indianapolis)
9 - WGN (IND 9 Chicago)
10 - WFYI (PBS 20 Indianapolis)
11 - WHMB (IND 40 Indianapolis)
12 - WCPO (CBS 9 Cincinnati)
13 - WTHR (NBC 13 Indianapolis)
14/A - WDTN (NBC 2 Dayton)
15/B - WPTD (PBS 16 Kettering)
16/C - WHAS (CBS 11 Louisville)
17/D - WDRB (IND 41 Louisville)
18/E - WCET (PBS 48 Cincinnati)
19/F - WLKY (ABC 32 Louisville)
20/G - WIPB (PBS 49 Muncie)
21/H - WAVE (NBC 3 Louisville)
22/I - WTBS (IND 17 Atlanta)
23/J - WKEF (ABC 22 Dayton)
24/K - WLWT (NBC 5 Cincinnati)
25/L - WPTO (PBS 14 Oxford)
26/M - WHIO (CBS 7 Dayton)
27/N - WXIX (IND 19 Newport)
28/O - WKON (PBS 52 Owenton) [KET]
Four of each Big Three network, which came in very handy during the numerous pre-emptions during this era (and for CBS and NBC, more NFL games!)