Is there a rhyme to identify what areas cars are assigned to by their ID number? Not radio ID, but the 4 digit ID each officer starts their transmission with. 5339 for example.
The wiki is pretty close, could use some editing (which I'll do on a free day). But for the 3rd digit, which usually designates the disctrict there is a little different.
0 ~ Sergeant
1 ~ Corporal
2-8 ~ Designates District
Again, this is for most everything except the admin units (55##).