200,016 is a radio ID, not a talkgroup ID. Talkgroups are 16-bit values in the range 0-65,535.
To followup, the ETSI DMR Tier 3 standard has a fleet numbering overlay in Annex E that may be what you're seeing here. I tried to manually convert some of the talkgroup values that mentioned back to the air interface 16-bit talkgroup values, to see if this is what's happening, but I couldn't make the conversion work.
https://www.dmrassociation.org/downloads/standards/ts_10236104v011201p.pdf (See annex E)
If radio reference is using these fleet overlay values in the database for talkgroups instead of the air interface values, that could be problematic to figure out if the database value is an air interface value, or is it an overlay value that needs to be converted to the air interface value before it can be used by the software. I'll reach out and ask the question.
Denny