town tax ID number used. Because the low numbers are already used, they needed to make them higher.
So take the tax town number multiply by 100 and add 10000
Avon is 004 - (00)4x100 is 400+10000 is 10400. So they have TGIDs 10400 through 10499 to use.
Radio IDs use the tax town number but because all the other users were being reprogrammed, they could start low. That is all in the State P25 radio numbering guidelines.
xxxyzzz
xxx=tax town
y=radio type
zzz=individual radio number
An Avon portable radio might be 41001, a mobile, 4401, a control station 49001, etc
chris