You sure this is still on? KDGE cancelled the Sunday morning version of the show on their main channel at the end of last year. It's a CC station, and a quick browse of iHeartRadio shows no mention of "Old School Edge" anywhere. They normally will make their HD2 channels available on the platform. There's no link to it on their main website either. I'm wondering if they just have it on random and it's just a placeholder until they decide what they want to do with the HD2.
You would think, but KDGE doesn't stream their HD2 subchannel, even when they aired its previous "Cutting Edge" format. That's why I said, you may have to travel to DFW with an HD Radio receiver to listen. And yes, I checked on my HD radio and it's still on the HD2 signal...for now. Though it intermittently goes off the air for 15 to 30 seconds after a certain period of time for some odd reason.