Does Dallas FD still use 460.575?
Yep
Still being used for “station dispatch”, though that process is also simulcast on NTIRN.
Last time there was a working fire relatively close to me, the old simplex UHF fireground channels were also still being used.
I haven’t noticed consistent usage on the ‘numbered’ fire tgid’s, but TGID 32013, DFR Fire Channel 5, is set up in the Calls section of Broadcastify, and is carrying what seemed to be fireground traffic. I listened to one fairly lengthy recording and it was traffic between units at a hazmat incident. But calls history is not ‘dense’ enough to see that it is used consistently. Calls history, on that specific channel, showed a little less than 30 hits from 2:39pm on 05/6 to 7:15pm on 05/11. Obviously, that being all that was recorded, it’s not remotely capturing every call dispatched during that time period.
Another lengthy audio clip, also on TGID 32013, was units (engines, trucks, etc) audibly checking enroute to a structure fire, repeating the address and equipment number. These were widely separated calls, so apparently that channel is not dedicated to only a specific section of the city.
I’ll set up my SDS200 to record all activity on those channels (Fire 5 to Fire 12), with Tac A to Tac D included just in case, and see if more are in use.