The flagship was KTVT, channel 11, in Dallas. It aired on Saturday nights from 10pm-12am. I vividly remember my father going out to rotate the antenna towards Dallas so he and I could watch it every weekend. They ran a repeat on Sunday mornings, I believe. Going back to the 60s and early 70s, it aired on Channel 4 KRLD-TV. That predates me, but was written about in Bill Mercer's memoir.
Keep in mind, during the territory days, there wasn't much in the way of overlap between the home offices. Talents were sometimes heel in one territory, and face in the other. Bruiser Brody is a prime example, as is Andre the Giant. Dallas had Fritz Von Erich's NWA Big Time Wrestling/World Class, Shreveport had Bill Watts Mid-South Wrestling on KTBS channel 3, Houston had Paul Boesch's Houston Wrestling on KHTV 39 in Houston, Joe Blanchard ran Southwest Championship Wrestling on channel 4 in San Antonio, etc. The only national wrestling shows, at least down here, were Georgia Championship Wrestling on superstation WTBS, and the WWF squash matches on various independent stations around the State of Texas.