Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA4OAA callsign genealogy
Currently held by FLOHR, FRANK V
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 KA4OAA's current licensee, walking backwards.
- Flohr, Frank VCOgranted 2017-11-09cancelled 2017-11-28
Successor callsigns
Callsigns held now by people who previously held KA4OAA.
- Flohr, Frank VCOgranted 2020-08-04
All historical holders
Every license row we've seen with the callsign KA4OAA, oldest first.
- FLOHR, FRANK V FL1998-05-05 → cancelled 2010-05-06
- Flohr, Frank V CO2017-11-28 → cancelled 2020-08-04