Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N5UMR callsign genealogy
Currently held by SHARP, BILLY J
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by N5UMR's current licensee, walking backwards.
- Sharp, Billy JTXgranted 2009-04-24cancelled 2009-05-15
Successor callsigns
Callsigns held now by people who previously held N5UMR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N5UMR, oldest first.
- SHARP, BILLY J TX1997-03-28 → cancelled 2003-07-03
- SHARP, BILLY J TX2019-05-31 active