$325 generally was the input to the ole CBP
$325 in / $301 out
But, see if you continue to get this, or it was a fluke for the NAC, depending on what your scanner last heard, I have regularly seen false NAC's due to the radio not refreshing it self fast enough
As to 169.9125 that is open to a whole host of agencies, and not just those with LE components.
169.9125 NAC 325 received at my location. Possible Washington DC, Northern Virginia or Maryland location. Any ideas on who is using it?