Create a group for your UIDs. Enter the ID# as (example)
i272 with the i preceding the actual number then assign it an alpha tag.
There is only one problem streaming in this way. The scanner will stream ALL transmissions from that radio/unit ID, regardless of the talk group in use, including private calls, phone patches, Tac channels, etc. which may violate the Feed Provider Terms of Service.
I attempted to stream ID tags on my feed and that is how I discovered this. I just stream the number itself and advise listeners on how to decipher what it means.
Try to find a Radio ID Structure Chart for your system, some thing like
this