Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0RTB callsign genealogy
Currently held by Barowsky, Robert T
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 W0RTB's current licensee, walking backwards.
- Barowsky, Robert TCOgranted 2019-03-18cancelled 2019-04-26
Successor callsigns
Callsigns held now by people who previously held W0RTB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W0RTB, oldest first.
- KOEPP, HARRY J CO1987-11-10 → cancelled 1999-11-11
- Barowsky, Robert T CO2019-04-26 active