Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W3QM callsign genealogy
Currently held by CLAUS III, FREDERICK 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 W3QM's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W3QM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W3QM, oldest first.
- CLAUS III, FREDERICK R PA2006-12-08 → cancelled 2019-02-12
- KRULISH JR, RICHARD R CO2019-02-26 active