Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB0OSR callsign genealogy
Currently held by MONAHAN, LEE ROY E
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 WB0OSR's current licensee, walking backwards.
- Monahan, Steve CORgranted 2016-03-29cancelled 2016-04-16
Successor callsigns
Callsigns held now by people who previously held WB0OSR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WB0OSR, oldest first.
- MONAHAN, LEE ROY E OR1988-08-23 → cancelled 2000-08-24
- Monahan, Steve C OR2016-04-16 active