Looks like 172.2875 $167 is related to the FBI based on a new tone observed, and a radio check heard on it based out of Newark. Maybe has multiple NAC's for different uses??
Also, I've noticed that the FBI Newark Base radio checks vary now by time, but mostly based around the :15 & :45 past the hour still.
please don't post this frequency to the radioreference database or wiki, i would hate to see it go encrypted. in fact, could you delete this whole forum post please?
its a strong signal 10 miles north of trenton, nj, can pick it up with a 1 inch antenna. alot of talkaround usage, mostly referred to as charlie 1, sometimes F1. its been used from north philadelphia.