NAC's are like PL Tones, we collect them
As for the input, it helps when monitoring and if you happen to hear them on the input you know they are close by.
Nothing Suspect, but a few die-hard scannists looking for info that is kept close to the vest
BP and ICE seem to use a different NAC on each Repeater, but use a Common NAC for the input
of the Wide-Area Nets
CBP / BP and ICE are part of DHS, but still operate their own Radio Networks.
Sadly too many people are lumping all DHS Agencies under DHS [Parent Agency] vs listing them individually.
FPS is still FPS altho under DHS
USCG is still USCG altho under DHS
Yes they share common channels, but remain unto their own.
Why do you want the Input and NAC codes ??? CBP is now DHS and uses 3 repeaters on Hayden Peak. They are 163.675, 163.625 (Not used very Often) and 173.6875. They also use the "ALLIANCE" repeater system on multiple MTN Tops, I believe it is on 167.800.
Enjoy