Question about Patching on P25 System

I'm monitoring my local P25 system with Unitrunker. Let me give you a brief summary of the system. Fire Dispatch is 13463, Fire 1 is 13500, and there are a number of unidentified talkgroups in the 13436-13449 range. What I'm seeing is that our local fire units are being dispatched on a mutual aid call. Dispatch goes out and sends them over to Fire 1. Their radios all affiliate to Fire 1. Then without any further affiliations, I'm seeing all those radios with call traffic on 13437. My assumption is that a patch has been initiated with Fire 1 and this new patch talkgroup. There are other radios from neighboring counties with radio IDs in another range altogether. Their radios actually affiliate with 13437. So what exactly is this talkgroup 13437, and how should it be described in the database? Also, is there any way to identify this patch with Unitrunker? Thanks for any help!



Another question -- just curious if our county's radio system is able to re-assign other counties' radios to whatever RIDs we want (on our system) based on which county they are from. For example, I'm seeing what appears to be the following:



262xxxx - Washington County

263xxxx - Washington County

4xxxxxx - Frederick County?

6xxxxxx - ??

8xxxxxx - Berkeley County?

9xxxxxx - Morgan County?



In other words, are those RIDs necessarily the same on both our P25 system and their own counties' P25 systems, or is it possible that our system automatically maps radios to specific ranges to avoid conflicts?