Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WA5BWX callsign genealogy
Currently held by SIBLEY, SYLVAN R
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 WA5BWX's current licensee, walking backwards.
- Sibley, MichaelTNgranted 2026-06-09cancelled 2026-06-30
Successor callsigns
Callsigns held now by people who previously held WA5BWX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WA5BWX, oldest first.
- SIBLEY, SYLVAN R LA1999-11-18 → cancelled 2012-02-14
- Sibley, Michael W TN2026-06-30 active