Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AF0U callsign genealogy
Currently held by TETZLAFF, ARCHIBALD O
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 AF0U's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held AF0U.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AF0U, oldest first.
- TETZLAFF, ARCHIBALD O MO2006-02-14 → cancelled 2018-05-15
- Cepek, Joshua T WI2018-06-01 active