Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9TRM callsign genealogy
Currently held by HAMMAR, RICHARD 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 W9TRM's current licensee, walking backwards.
- Hammar, Richard RMOgranted 2006-03-24cancelled 2007-03-17
Successor callsigns
Callsigns held now by people who previously held W9TRM.
No current licensee on record previously held this callsign.