Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W0RSM callsign genealogy
Currently held by Mayer Mr, Ryan S
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 W0RSM's current licensee, walking backwards.
- Mayer, Ryan SMOgranted 2020-04-09cancelled 2020-05-01
Successor callsigns
Callsigns held now by people who previously held W0RSM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W0RSM, oldest first.
- UNDERHILL, GLENN M NE1998-11-17 → cancelled 2010-11-19
- Mayer Mr, Ryan S MO2020-05-01 active