Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4OA callsign genealogy
Currently held by Eriksen, Jason
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 K4OA's current licensee, walking backwards.
- Eriksen, JasonTXgranted 2017-05-15cancelled 2017-07-08
Successor callsigns
Callsigns held now by people who previously held K4OA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4OA, oldest first.
- Dolvin, James R FL2005-05-17 → cancelled 2017-06-20
- Eriksen, Jason TX2017-07-08 active