Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0AFR callsign genealogy
Currently held by UBBEN, JEFF S
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 K0AFR's current licensee, walking backwards.
- Ubben, Jeff SKSgranted 2015-11-03cancelled 2016-01-05
Successor callsigns
Callsigns held now by people who previously held K0AFR.
- PETERSON, ROBERT LCOgranted 2012-11-10cancelled 2025-01-29
All historical holders
Every license row we've seen with the callsign K0AFR, oldest first.
- PETERSON, ROBERT L CO1998-05-28 → cancelled 2003-01-28
- UBBEN, JEFF S KS2025-11-27 active