Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0MM callsign genealogy
Currently held by MADSEN, RICHARD A
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 W0MM's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W0MM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W0MM, oldest first.
- MADSEN, RICHARD A MN1999-11-10 → cancelled 2001-04-19
- THOMIN, LAURENT D TX2023-04-01 active