In my GRE 600 & Pro 197's I enabled the "show trunking chan w/vc" & "Show CC info in TGRP display" along with the radio ID's through Win500. Now in the bottom line of the display, it will either show the radio ID OR under where the "TSYS" is it will show a 6 digit number such as 00248, 00328, 00625, etc. I searched 7 different TSYS within New Jersey and it is occuring on each. The same series of numbers keep rotating within each system usually about 6-8 sets. I guessing this is a tower id for which tower is handling the initial call? In the Indiana forum they are discussing "site aliases" but they have tower locations (towns)to go with their ID's. Here in NJ I'm only getting these 00xxx numbers. One small local department did show up as 09000 as it's one and only id. Perhaps Indiana SAFE-T decodes differently? Is there a way to further ID these numbers?