Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WB6UMR callsign genealogy
Currently held by NUDSON, GERALD H
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 WB6UMR's current licensee, walking backwards.
- Nudson, Thor EAZgranted 2010-07-27cancelled 2012-04-20
Successor callsigns
Callsigns held now by people who previously held WB6UMR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WB6UMR, oldest first.
- NUDSON, GERALD H CA2003-07-22 → cancelled 2010-04-29
- Nudson, Thor E AZ2024-04-11 active