Eric Carlson's P25-to-callsign converter says 927F9-00A translates to
WQWWA4. Any of those frequencies match an FCC callsign beginning with WQWW? (I did a quick check and came up empty, but sometimes the FCC callsign is for another unrelated site/system owned by the same entity.)
(The
aforementioned converter often will come back with part or all of a callsign, but if the SID i.e. 00A in this case has been altered, only part of the resulting string will match the FCC callsign).
This doesn't always work, sometimes the "P25 callsign" has no connection to the FCC callsign - but often it does (example: Michigan's MPSCS).