Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA9OTA callsign genealogy
Currently held by BERTELSON, JOHN D
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 WA9OTA's current licensee, walking backwards.
- BERTELSON, JOHN DNCgranted 2020-09-16cancelled 2020-10-20
Successor callsigns
Callsigns held now by people who previously held WA9OTA.
No current licensee on record previously held this callsign.