While the RR Database may or may not have those DMR/NXDN systems included, (it’s all about the voluntary contributions submitted by the users and in some cases the administrators of the Database), the Uniden SDS100/200 won’t work correctly if at all until the key is installed. But you still have to choose which systems/agencies to include in any Favorites Lists (FL’s) you choose to build for your SDS100… or did I miss your meaning?
I use Butel ARC PRO to program. And if memory serves me correctly, a trunked system that you try to include without choosing BOTH sites and talk groups (TG’s) will get you a prompt to choose some sites or TG’s before continuing. I suspect Sentinel and ProScan work likewise.
If you are intent on using the zip code, you will be loading a lot more than what you can hear, distance wise. The “Range”, feature, measured in miles, does not limit what’s loaded into your scanners memory by the miles you set in the Range feature. I live in central Ct. When I try the zip code feature, I expected the scanner to use GPS to see where that zip code is (my location) and only load those systems/agencies within the Range I have chosen. But that’s not the case… I can set the range to zero miles, 1 mile, 5 miles, enter my zip and I still get all of Ct., and parts of Ma. and NY lorded into the scanner, and ALL OF IT will be scanned! …suggest you create FL’s and forget using zip code location feature.