Just came up with some additional DEA UHF channels that had been previously unheard.
First, I received a report of DEA activity in the Boston area using 413.9750 MHz as an input to a 419.4250 MHz repeater. Both frequencies were using a NAC of N156. This would not only be reversed from other reports of a repeater on the 413 frequency with an input of 419, but it does not conform to the federal 9 MHz repeater offset.
Secondly, I was able to confirm that the DEA in El Paso, Texas is using 409.8250, 409.9500 and 410.8125 MHz, all with a NAC of N156. The 410.8125 MHz frequency had not been reported before.
Here then is my current list of "new" P-25 digital DEA channels in use in some areas of the country:
409.6250 MHz, N156 - Repeater, Possible F1
409.6750 MHz, N156 - Repeater, Possible F6
409.8125 MHz, N156 - Repeater, Possible F7
409.8250 MHz, N156 - Repeater, Possible F8
409.9000 MHz, N156 - Repeater, Possible F9
409.9500 MHz, N156 - Repeater, Possible F10
410.4125 MHz, N156 - Repeater/simplex, Possible F11
410.8125 MHz, N156 - Repeater
411.1250 MHz, N156 - Simplex (SPLX 1)
411.1500 MHz, N156 - Repeater/simplex?
412.2000 MHz, N156 - Simplex (SPLX 2?)
412.5250 MHz, N156 - Simplex
413.9750 MHz, N156 - Repeater/Simplex (SPLX 3)
414.2000 MHz, N156 - Simplex (SPLX 4)
414.4500 MHz, N156 - Simplex (SPLX 5)
418.3250 MHz, N156 - Simplex or possible input to 409.3250 repeater (not heard)
418.6250 MHz, N156 - Input to 409.6250 repeater
418.6750 MHz, N156 - Input to 409.6750 repeater
418.8125 MHz, N156 - Input to 409.8125 repeater
418.8250 MHz, N156 - Input to 409.8250 repeater
418.9000 MHz, N156 - Input to 409.9000 repeater
418.9500 MHz, N156 - Input to 409.9500 repeater
419.4250 MHz, N156 - Input to 413.9750 repeater
419.9750 MHz, N156 - Input to 413.9750 repeater?